1. changeable

- a capricious summer breeze

Similar word(s): unpredictable, freakish

2. determined by chance or impulse or whim rather than by necessity or reason

- a capricious refusal

- authoritarian rulers are frequently capricious

Similar word(s): arbitrary, impulsive, whimsical

Sentences with capricious as an adjective:

- I almost died in a capricious winter storm.

- Stringent rulers are unlikely to act capriciously.

- The Mayor claimed that the action was reasonable, but in reality the action was arbitrary and capricious in nature.