tõestad

Tõestad is an Estonian word form most commonly recognized as the second-person singular present indicative of the verb tõestama, meaning "to prove", "to verify" or "to authenticate". In everyday use it addresses a single person (sa tõestad), conveying that the addressee performs the act of proving or providing evidence. The form follows regular Estonian conjugation patterns for verbs in the -ma infinitive class (ma tõestan, sa tõestad, ta tõestab, me tõestame, te tõestate, nad tõestavad).

Etymologically the verb is related to Estonian roots tied to truth and proof (tõde, tõestus) and has parallels in other Finnic languages—Finnish todistaa has a similar meaning and reflects a common linguistic heritage. The word contains the Estonian vowel õ, a characteristic phoneme of the language.

Beyond its grammatical role, tõestad may appear in written and spoken contexts dealing with logic, law, science, and everyday claims where demonstration or verification is required. It can also occur as part of phrasal constructions and subordinate clauses (for example when stating conditions or requirements for proof). As a lexical item it is unremarkable in isolation and primarily meaningful within conjugated verbal usage or phraseological contexts.