contrariant

Etymology
, from, from , present participle of.

Adjective

 * 1) Contrary or antagonistic.

Noun

 * 1)  A thing that is contrary or of opposite qualities.

Adjective

 * 1) annoying, irritating
 * 2) antagonizing

Etymology
From.

Adjective

 * 1) vexatious
 * 1) vexatious