Capricious

Part of speech: adjective (a.)

Governed or characterized by caprice; apt to change suddenly; freakish; whimsical; changeable. "Capricious poet." Shak. "Capricious humor." Hugh Miller. A capricious partiality to the Romish practices. Hallam.

Synonyms: Freakish; whimsical; fanciful; fickle; crotchety; fitful; wayward; changeable; unsteady; uncertain; inconstant; arbitrary. Ca*pri"cious*ly, adv. Ca*pri"cious*ness, n.