uneven temper; capriciousness; whimsicality
Describes a personality or mood that changes unpredictably; often used for someone who is moody, temperamental, or acts on a whim. Can be used as a noun or na-adjective.
He is capricious and sometimes suddenly gets into a bad mood.
むら気な性格のせいで、周りは振り回される。
Because of his whimsical personality, those around him are at his mercy.
Standard mixed kanji-kana spelling. The kanji 気 is common, while むら is usually written in kana.
Katakana variant of the first part, sometimes used for emphasis or stylistic reasons.
Full kanji spelling using 斑 (uneven, spotted). Rare and may be unfamiliar to many readers.
むら (斑) means 'uneven' or 'spotted', and 気 (き) means 'spirit' or 'temper'. The combination literally suggests an uneven disposition. The reading むらぎ is a voiced variant, but むらき is more common.