erratic

Definitions

Not even or regular in pattern or movement; unpredictable.

Having no fixed course; wandering or roving.

Examples

The driver's erratic behavior on the highway caused several other cars to swerve.

Her erratic sleep schedule made it difficult for her to focus during the morning meetings.

The stock market has been highly erratic lately, leaving investors feeling uncertain about the future.

Synonyms

unpredictable inconsistent irregular unstable capricious volatile fitful

Antonyms

consistent predictable stable steady reliable regular constant