flighty

Definitions

Fickle and irresponsible; lacking seriousness or stability.

Given to sudden, whimsical changes of mind or mood.

Easily excited or frightened; skittish.

Examples

She has a flighty personality and often changes her mind about her career goals.

The flighty horse spooked at the sound of a rustling leaf and bolted across the field.

Synonyms

fickle capricious frivolous mercurial scatterbrained whimsical giddy

Antonyms

reliable steadfast serious dependable sensible constant levelheaded