unpredictable or all over the place

erratic

adjective|/ɪˈræt.ɪk/

Unpredictable and inconsistent in behavior or pattern

Examples

In a meeting

Sales have been erratic this quarter, making forecasting difficult.

Over coffee

His sleep schedule has been really erratic lately.

Why this word

unpredictable

erratic emphasizes irregular, inconsistent patterns of behavior, while unpredictable only means hard to forecast

inconsistent

erratic suggests wandering or deviating without pattern or reason, while inconsistent means not matching or contradictory

irregular

erratic implies randomness and lack of reliability, while irregular simply means not following a regular pattern

Usage tip

Suggests lack of pattern or reliability; often describes behavior, performance, or movement

Etymology

Latin 'erraticus' meaning 'wandering' (from 'errare' to wander, err)

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