Perhaps from a special use of the interjection O, oh; and/or perhaps from o (“one”), from Middle English o, oo, variant of a, on, oon, an (“one”). See one and -y.
-o generally does not change the meaning of the word or name but only makes it more colloquial, as with cheapo and Jacko. It is often appended to clipped or elided forms of longer words, as with ambo and parmo. Occasionally, the terminal consonant of the clipped form is doubled for clarity of meaning or pronunciation, as with uggo and doggo. It sometimes does change the meaning of words, usually by being applied to adjectives to indicate a person with a pronounced trait, as with weirdo (“weird person”), or to nouns used metonymously to indicate a person with a pronounced connection to the other object, as with wino (“poor or vagrant alcoholic”). Especially in American English, some uses of this suffix are understood as dated slang, as with bucko and neato. The suffix is most frequently and widely encountered in Australian English, which has additional uses (such as rego for registration and nasho for national service) that are never or only extremely rarely encountered in other dialects.
Its meaning is very similar to some uses of -y and its use is particularly common where use of -y might cause misunderstanding, as with randy and rando, journey and journo, whiny and wino.
From many Spanish or Italian words that end in o. This ending in such Spanish or Italian words generally derives from -um, the accusative singular inflectional ending for masculine and neuter nouns in Latin.
-o
Back-formation from typo.
-o (plural -os)
-ó
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
-ó
-o
-o
Conflated:
-o (front vowel harmony variant -ö, linguistic notation -O)
Inflection of -o (Kotus type 1/valo, no gradation) | ||||
---|---|---|---|---|
nominative | -o | -ot | ||
genitive | -on | -ojen | ||
partitive | -oa | -oja | ||
illative | -oon | -oihin | ||
singular | plural | |||
nominative | -o | -ot | ||
accusative | nom. | -o | -ot | |
gen. | -on | |||
genitive | -on | -ojen | ||
partitive | -oa | -oja | ||
inessive | -ossa | -oissa | ||
elative | -osta | -oista | ||
illative | -oon | -oihin | ||
adessive | -olla | -oilla | ||
ablative | -olta | -oilta | ||
allative | -olle | -oille | ||
essive | -ona | -oina | ||
translative | -oksi | -oiksi | ||
abessive | -otta | -oitta | ||
instructive | — | -oin | ||
comitative | See the possessive forms below. |
Possessive forms of -o (Kotus type 1/valo, no gradation) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Analogically extended from various clippings with etymological o, such as vélo, resto < vélocipède, restaurant. Its pronunciation perhaps had input from -aud.
-o (informal)
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
-o
-o
From Esperanto -o, from Romance languages.
-o
Inherited from Latin -us, from Proto-Indo-European *-os (creates action nouns from verbs).
-o m (noun-forming suffix, plural -i)
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)
-o (past participle-forming suffix, feminine -a, masculine plural -i, feminine plural -e)
-o (non-lemma form of verb-forming suffix)
See Proto-Indo-European *-h₃onh₂- (with nominative ō made common to all cases).
-ō m (genitive -ōnis); third declension
Third-declension noun.
Case | Singular | Plural |
---|---|---|
Nominative | -ō | -ōnēs |
Genitive | -ōnis | -ōnum |
Dative | -ōnī | -ōnibus |
Accusative | -ōnem | -ōnēs |
Ablative | -ōne | -ōnibus |
Vocative | -ō | -ōnēs |
From Proto-Italic *-ōd, an ablative suffix, derived from Proto-Indo-European *-éad.
-ō (comparative -ius, superlative -issimō)
From Proto-Italic *-āō, from the following sources:
Cognates of the whole first conjugation in the present in Latin and Proto-Italic include Proto-Germanic *-ōną (referring to the whole conjugation in which the infinitive is *-ōną), Ancient Greek -άω (-áō, contracted verb), -अयति (-ayati) (for the causative in Sanskrit), Proto-Celtic *-āti and Proto-Balto-Slavic *-ā́ˀtei (whence the infinite Proto-Slavic *-ati, referring again to the whole conjugation).
-ō (present infinitive -āre, perfect active -āvī, supine -ātum); first conjugation
Conjugation of -ō (first conjugation, verbs with the perfect infix -u-) | |||||||
---|---|---|---|---|---|---|---|
indicative | singular | plural | |||||
first | second | third | first | second | third | ||
active | present | -ō | -ās | -at | -āmus | -ātis | -ant |
imperfect | -ābam | -ābās | -ābat | -ābāmus | -ābātis | -ābant | |
future | -ābō | -ābis | -ābit | -ābimus | -ābitis | -ābunt | |
perfect | -uī | -uistī | -uit | -uimus | -uistis | -uērunt, -uēre | |
pluperfect | -ueram | -uerās | -uerat | -uerāmus | -uerātis | -uerant | |
future perfect | -uerō | -ueris | -uerit | -uerimus | -ueritis | -uerint | |
sigmatic future1 | -āssō | -āssis | -āssit | -āssimus | -āssitis | -āssint | |
passive | present | -or | -āris, -āre |
-ātur | -āmur | -āminī | -antur |
imperfect | -ābar | -ābāris, -ābāre |
-ābātur | -ābāmur | -ābāminī | -ābantur | |
future | -ābor | -āberis, -ābere |
-ābitur | -ābimur | -ābiminī | -ābuntur | |
perfect | -ātus + present active indicative of sum | ||||||
pluperfect | -ātus + imperfect active indicative of sum | ||||||
future perfect | -ātus + future active indicative of sum | ||||||
sigmatic future1 | -āssor | -āsseris | -āssitur | — | — | — | |
subjunctive | singular | plural | |||||
first | second | third | first | second | third | ||
active | present | -em | -ēs | -et | -ēmus | -ētis | -ent |
imperfect | -ārem | -ārēs | -āret | -ārēmus | -ārētis | -ārent | |
perfect | -uerim | -uerīs | -uerit | -uerīmus | -uerītis | -uerint | |
pluperfect | -uissem | -uissēs | -uisset | -uissēmus | -uissētis | -uissent | |
sigmatic aorist1 | -āssim | -āssīs | -āssīt | -āssīmus | -āssītis | -āssint | |
passive | present | -er | -ēris, -ēre |
-ētur | -ēmur | -ēminī | -entur |
imperfect | -ārer | -ārēris, -ārēre |
-ārētur | -ārēmur | -ārēminī | -ārentur | |
perfect | -ātus + present active subjunctive of sum | ||||||
pluperfect | -ātus + imperfect active subjunctive of sum | ||||||
imperative | singular | plural | |||||
first | second | third | first | second | third | ||
active | present | — | -ā | — | — | -āte | — |
future | — | -ātō | -ātō | — | -ātōte | -antō | |
passive | present | — | -āre | — | — | -āminī | — |
future | — | -ātor | -ātor | — | — | -antor | |
non-finite forms | active | passive | |||||
present | perfect | future | present | perfect | future | ||
infinitives | -āre | -uisse | -ātūrum esse | -ārī, -ārier2 |
-ātum esse | -ātum īrī | |
participles | -āns | — | -ātūrus | — | -ātus | -andus | |
verbal nouns | gerund | supine | |||||
genitive | dative | accusative | ablative | accusative | ablative | ||
-andī | -andō | -andum | -andō | -ātum | -ātū |
1At least one use of the archaic "sigmatic future" and "sigmatic aorist" tenses is attested, which are used by Old Latin writers; most notably Plautus and Terence. The sigmatic future is generally ascribed a future or future perfect meaning, while the sigmatic aorist expresses a possible desire ("might want to"). It is also attested as having a rare sigmatic future passive indicative form ("will have been"), which is not attested in the plural for any verb.
2The present passive infinitive in -ier is a rare poetic form which is attested.
3At least one rare poetic syncopated perfect form is attested.
From Proto-Italic *-ō, from at least two sources:
-ō (present infinitive -ere, perfect active -ī, supine -um); third conjugation
Conjugation of -ō (third conjugation) | |||||||
---|---|---|---|---|---|---|---|
indicative | singular | plural | |||||
first | second | third | first | second | third | ||
active | present | -ō | -is | -it | -imus | -itis | -unt |
imperfect | -ēbam | -ēbās | -ēbat | -ēbāmus | -ēbātis | -ēbant | |
future | -am | -ēs | -et | -ēmus | -ētis | -ent | |
perfect | -ī | -istī | -it | -imus | -istis | -ērunt, -ēre | |
pluperfect | -eram | -erās | -erat | -erāmus | -erātis | -erant | |
future perfect | -erō | -eris | -erit | -erimus | -eritis | -erint | |
sigmatic future1 | -ō | -is | -it | -imus | -itis | -int | |
passive | present | -or | -eris, -ere |
-itur | -imur | -iminī | -untur |
imperfect | -ēbar | -ēbāris, -ēbāre |
-ēbātur | -ēbāmur | -ēbāminī | -ēbantur | |
future | -ar | -ēris, -ēre |
-ētur | -ēmur | -ēminī | -entur | |
perfect | -us + present active indicative of sum | ||||||
pluperfect | -us + imperfect active indicative of sum | ||||||
future perfect | -us + future active indicative of sum | ||||||
sigmatic future1 | -or | -eris | -itur | — | — | — | |
subjunctive | singular | plural | |||||
first | second | third | first | second | third | ||
active | present | -am | -ās | -at | -āmus | -ātis | -ant |
imperfect | -erem | -erēs | -eret | -erēmus | -erētis | -erent | |
perfect | -erim | -erīs | -erit | -erīmus | -erītis | -erint | |
pluperfect | -issem | -issēs | -isset | -issēmus | -issētis | -issent | |
sigmatic aorist1 | -im | -īs | -īt | -īmus | -ītis | -int | |
passive | present | -ar | -āris, -āre |
-ātur | -āmur | -āminī | -antur |
imperfect | -erer | -erēris, -erēre |
-erētur | -erēmur | -erēminī | -erentur | |
perfect | -us + present active subjunctive of sum | ||||||
pluperfect | -us + imperfect active subjunctive of sum | ||||||
imperative | singular | plural | |||||
first | second | third | first | second | third | ||
active | present | — | -e | — | — | -ite | — |
future | — | -itō | -itō | — | -itōte | -untō | |
passive | present | — | -ere | — | — | -iminī | — |
future | — | -itor | -itor | — | — | -untor | |
non-finite forms | active | passive | |||||
present | perfect | future | present | perfect | future | ||
infinitives | -ere | -isse | -ūrum esse | -ī | -um esse | -um īrī | |
participles | -ēns | — | -ūrus | — | -us | -endus, -undus | |
verbal nouns | gerund | supine | |||||
genitive | dative | accusative | ablative | accusative | ablative | ||
-endī | -endō | -endum | -endō | -um | -ū |
1At least one use of the archaic "sigmatic future" and "sigmatic aorist" tenses is attested, which are used by Old Latin writers; most notably Plautus and Terence. The sigmatic future is generally ascribed a future or future perfect meaning, while the sigmatic aorist expresses a possible desire ("might want to"). It is also attested as having a rare sigmatic future passive indicative form ("will have been"), which is not attested in the plural for any verb.
From Old Latin -ōi, from Proto-Italic *-ōi, from Proto-Indo-European *-oey.
-ō
Borrowed from Paleo-Balkan. Compare Albanian -ónjë, Aromanian -oanje, -oanji, -onje and Romanian -oaie, all forming feminine equivalent of nouns.
-ō f (genitive -ōnis); third declension
From Proto-Balto-Slavic *-ā; compare Latvian -a, Proto-Slavic *-a (“id”). From the Proto-Indo-European thematic masculine ablative ending *-ōd, with regular Balto-Slavic loss of final d. Compare Sanskrit -आत् (-āt), Latin -ō and Ancient Greek ὄπ-ω (óp-ō, “whence”). In Balto-Slavic, the genitive merged with the ablative. The original genitive was retained, however, in West Baltic; compare Old Prussian -as, presumably from Proto-Indo-European *-os; compare Hittite 𒀸 (-as).
-õ
-o
-õ
-o
-o
From Proto-West Germanic *-ō, from Proto-Germanic *-ô.
-o
From Proto-West Germanic *-jō, from Proto-Germanic *-jô.
-o
-o
From Proto-Germanic *-ô.
-o
From Proto-Germanic *-ô. Cognate to Old English -a, in ǣta (“eater”), Old Norse -i, Gothic -𐌰 (-a), in 𐌽𐌿𐍄𐌰 (nuta, “fisher”). In some cases, the root appears in the zero-grade as in boto (from biotan).
-o m
Most nouns with this suffix follow the n-declension, like hano (“cock”), namo (“name”), gomo (“man”).
In Middle High German, the suffix is replaced by -er (whence German -er), as in Middle High German gëber instead of Old High German gëbo. Only a few German words still have a final -e that results from Old High German -o.
-o
From Proto-Germanic *-ô.
-o
From Proto-Germanic *-ô. Cognate to Old English -a, in ǣta (“eater”), Gothic -𐌰 (-a), in 𐌽𐌿𐍄𐌰 (nuta, “fisher”).
-o m
(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.) Doublet of -um.
-o
Inherited from Old Galician-Portuguese -o, from Latin -um.
-o
Inherited from Old Galician-Portuguese -o, from Latin -ō, -eō, -iō. Compare Galician and Spanish -o.
-o
-o
From Proto-Slavic.
-o
This form of the vocative is informal, especially when referring to a person. The nominative/accusative ending is preferred.
Inherited from Latin -um, accusative of -us.
-o m (noun-forming suffix, plural -os)
-o (non-lemma form of verb-forming suffix)
-o
Class | Subject concord | Object concord | Relative | |
---|---|---|---|---|
affirmative | negative | |||
m(I) | a-, yu- | ha-, hayu- | -m-, -mw-, -mu- | -ye |
wa(II) | wa- | hawa- | -wa- | -o |
m(III) | u- | hau- | -u- | -o |
mi(IV) | i- | hai- | -i- | -yo |
ji(V) | li- | hali- | -li- | -lo |
ma(VI) | ya- | haya- | -ya- | -yo |
ki(VII) | ki- | haki- | -ki- | -cho |
vi(VIII) | vi- | havi- | -vi- | -vyo |
n(IX) | i- | hai- | -i- | -yo |
n(X) | zi- | hazi- | -zi- | -zo |
u(XI) | u- | hau- | -u- | -o |
ku(XV/XVII) | ku- | haku- | -ku- | -ko |
pa(XVI) | pa- | hapa- | -pa- | -po |
mu(XVIII) | m-, mw-, mu- | ham-, hamw-, hamu- | -mu- | -mo |
For a full table including first and second person, see Appendix:Swahili personal pronouns. |
-o
-o
Inherited from Old Swedish -u, -o, from Old Norse -u.
-o
-o
-o
-o
From Middle Welsh -aw, from Proto-Brythonic *-ọβ̃.
-o
This suffix is mostly used for verbs where the stem ends in the consonant i (though for some such verbs, such as cynnig, the verbnoun is given by dropping the i from the stem) or the vowel in the last syllable is i, u, eu, or wy.