反覆不定 fǎnfùbùdìng changeable Origin Definitions Defs Strokes Stroke Words Sentences Sents 反覆 fǎnfù undependable changeable or not dependable; prone to changing one's mind or going back on one's word.不定 bùdìng adjective indefinite not fixed or certain; indeterminate; wandering or shifting; without a fixed result or settlement