arbitrary

Definitions

Based on random choice or personal whim rather than any reason or system.

Unrestrained and autocratic in the use of authority or power.

Examples

The judge's decision seemed completely arbitrary and lacked any clear legal basis.

We made an arbitrary choice to visit the park instead of the museum.

The rules of the game felt arbitrary, as if they were being invented on the spot.

Synonyms

random capricious whimsical subjective unreasoned discretionary erratic

Antonyms

logical rational reasoned systematic objective consistent deliberate