ta

tacit (adj.) expressed without words (I interpreted my parents’ refusal to talk as a tacit acceptance of my request.)

taciturn (adj.) not inclined to talk (Though Jane never seems to stop talking, her brother is quite taciturn.)

tangential (adj.) incidental, peripheral, divergent (I tried to discuss my salary, but the boss kept veering off into tangential topics.)

tantamount (adj.) equivalent in value or significance (When it comes to sports, fearing your opponent is tantamount to losing.)