From Old Norse þú, from Proto-Germanic *þū, from Proto-Indo-European *túh₂. Cognate with English thou, German du.
þú
After verbs, the pronoun þú is either separated:
or suffixed and changed into -ðu, -du, or -u:
If the verb ends in a "t", -u is used. If it ends in a "m" or "n", -du is used. Otherwise -ðu is used.
The suffixed version is almost always used except when the speaker wants to emphasize "þú" or sound more formal.
Many younger speakers will write borðaru instead of borðarðu.
Icelandic personal pronouns | ||||||
singular | first person | second person | third person masculine | third person feminine | third person neuter | |
nominative | ég, eg, ek† | þú | hann | hún, hon†, hón† | það, þat† | |
accusative | mig, mik† | þig, þik† | hann | hana | það, þat† | |
dative | mér | þér | honum, hánum† | henni | því | |
genitive | mín | þín | hans | hennar | þess | |
plural | first person | second person | third person masculine | third person feminine | third person neuter | |
nominative | við | þið, þit† | þeir | þær | þau | |
accusative | okkur | ykkur | þá | þær | þau | |
dative | okkur | ykkur | þeim | þeim | þeim | |
genitive | okkar | ykkar | þeirra | þeirra | þeirra |
From Proto-Germanic *þū (“you; thou”), from Proto-Indo-European *túh₂ (“you; thou”).
þú
It may become enclitic when after a verb, that is, be appended to the preceding word as either -du, -ðu or -tu depending on the consonant cluster. The rules for this are the same as for the past tense dental suffixes of the class 1 weak verbs. This may happen more often in Old Norse, as the personal pronoun is often used with the singular imperative. This is not to say, however, that whenever þú comes after a verb, it will always take an enclitic form. It could well stay separate for the sake of emphasis. With the clitics, this is how it ends up looking.
Note, as seen in the last two examples, that this does not cause u-umlaut.
number | first person | second person | reflexive | third person | ||
---|---|---|---|---|---|---|
case | singular | singular masculine | singular feminine | singular neuter | ||
nominative | ek | þú | hann | hon, hón, hǫ́n | þat | |
accusative | mik | þik | sik | hann | hana, hána | þat |
dative | mér | þér | sér | hánum, hónum, hǫ́num | henni | því |
genitive | mín | þín | sín | hans | hennar | þess |
case | dual | |||||
nominative | vit | it, þit | ||||
accusative | okkr | ykkr | sik | |||
dative | okkr | ykkr | sér | |||
genitive | okkar | ykkar | sín | |||
case | plural | plural masculine | plural feminine | plural neuter | ||
nominative | vér | ér, þér | þeir | þær | þau | |
accusative | oss | yðr | sik | þá | þær | þau |
dative | oss | yðr | sér | þeim | þeim | þeim |
genitive | vár | yðar, yðvar | sín | þeira, þeirra | þeira, þeirra | þeira, þeirra |
The enclitic use lives on in modern Icelandic þú. See there for more.