不穩定 bùwěndìng unstable Origin Definitions Defs Strokes Stroke Words Sentences Sents 不 bù adverb not Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings稳定 穩定 wěndìng adjective stable; stability steady; stable; calm and unhurried; without major fluctuations