antitheses

noun pl. antitheses

1. a contrast or opposition of thoughts, usually in two phrases, clauses, or sentences (Ex.: you are going; I am staying)
2. the second part of such an expression
3. a contrast or opposition
4. the exact opposite: joy is the antithesis of sorrow

Origin: ME antitesis < LL antithesis < Gr < antithenai < anti-, against + tithenai, to place: see do