Entry Word: whimsical

Function: adjective

Meaning: prone to sudden illogical changes of mind, ideas, or actions <it's hard to make plans with my whimsical best friend>

Synonyms capricious, freakish, impulsive

Related Words mercurial, moody, temperamental, volatile; eccentric, flaky, quirky; arbitrary, erratic, fickle, inconstant, irregular, willful (or wilful); impractical, quixotic, romantic

Near Antonyms equable; levelheaded, logical, practical, reasonable, sensible; fast, fixed, hard-and-fast, immutable, inflexible, invariable, unalterable, unchangeable; changeless, constant, established, set, settled, stable, steadfast, steady, unchanging, unvarying