From Proto-Finnic *toci, compare dialectal tosi (Northeastern Coastal dialect).
Further etymology is unclear. Possibly from Proto-Uralic *čoďe (compare Northern Mansi со̄ль (sōlʹ)). Other hypoteses include both a Baltic borrowing, compare Lithuanian stačias (“straight; erect, upright”), status (“steep”), and a Germanic loan, possibly from Proto-Germanic *stōdija- (“firm, steadfast, steady, serious, honest, fair”). Both can be traced back to the same Proto-Indo-European root: *steh₂- (“to stand”).
Cognates include Finnish tosi, Votic tõsi, Livonian tuož, Ingrian and Karelian tosi, Livvi, Livonian, Ludian, and Veps tozi and Northern Sami duohta (from Proto-Samic *tuotë, probably borrowed from Proto-Finnic).
tõsi (genitive tõe, partitive tõtt)
This term is considered a noun in Estonian dictionaries, but it often behaves as a predicative adjective, a particle or an interjection.
tõsi and its synonym tõde differ only in the nominative and partitive singular. Other than that, they are fully synonymous both grammatically and semantically.
Declension of tõsi (ÕS type 15/käsi, d/t-ø-s gradation) | |||
---|---|---|---|
singular | plural | ||
nominative | tõsi | tõed | |
accusative | nom. | ||
gen. | tõe | ||
genitive | tõte | ||
partitive | tõtt | tõsi | |
illative | tõtte tõesse |
tõtesse tõsisse | |
inessive | tões | tõtes tõsis | |
elative | tõest | tõtest tõsist | |
allative | tõele | tõtele tõsile | |
adessive | tõel | tõtel tõsil | |
ablative | tõelt | tõtelt tõsilt | |
translative | tõeks | tõteks tõsiks | |
terminative | tõeni | tõteni | |
essive | tõena | tõtena | |
abessive | tõeta | tõteta | |
comitative | tõega | tõtega |
From Proto-Finnic *toci.
tõsi
When this adjective is used attributively, the nominative singular form is (chiefly) used. When it is used predicatively, the partitive singular form is used.
All other forms except the nominative and partitive singular forms are rare and are only practically used as adverbs; see the usage notes.
Declension of tõsi (type X/tuli, t- gradation) | ||
---|---|---|
singular | plural | |
nominative | tõsi | tõõd |
genitive | tõõ | tõsijõ, tõsii |
partitive | tõttõ | tõsiitõ, tõsii |
illative | tõttõ, tõttõsõ | tõsiisõ |
inessive | tõõz | tõsiiz |
elative | tõõssõ | tõsiissõ |
allative | tõõlõ | tõsiilõ |
adessive | tõõllõ | tõsiillõ |
ablative | tõõltõ | tõsiiltõ |
translative | tõõssi | tõsiissi |
*) the accusative corresponds with either the genitive (sg) or nominative (pl) **) the terminative is formed by adding the suffix -ssaa to the short illative (sg) or the genitive. ***) the comitative is formed by adding the suffix -ka to the genitive. |