"very," 1815, from French très, from Old French tres "right, precisely, completely, very," from Latin trans "beyond" (see trans-), later "very" (compare Old Italian trafreddo "very cold").
Entries linking to tres
trans-
word-forming element meaning "across, beyond, through, on the other side of, to go beyond," from Latin trans (prep.) "across, over, beyond," perhaps originally present participle of a verb *trare-, meaning "to cross," from PIE *tra-, variant of root *tere- (2) "cross over, pass through, overcome." In chemical use indicating "a compound in which two characteristic groups are situated on opposite sides of an axis of a molecule" [Flood].