- 说不定 shuōbudìng perhapsperhaps; maybe; it's possible that
- 摇摆不定 yáobǎibùdìng swayingTo swing or oscillate back and forth without stopping
- 举棋不定 jǔqíbùdìng to hesitate(idiom) to hesitate over what move to make in a game of chess; to be unable to make up one's mind; to waver or vacillate
- 飘忽不定 piāohūbùdìng to drift aboutto drift from place to place without a fixed location; wandering; vagrant
- 捉摸不定 zhuōmōbùdìng unpredictableelusive; hard to pin down; impossible to fathom or grasp; difficult to guess or anticipate
- 心神不定 xīnshénbùdìng restlessto feel uneasy or restless in one's mind; to be unable to concentrate or stay calm
- 指不定 zhǐbudìng maybe(colloquial) perhaps; maybe; it's hard to say for sure; equivalent to [[说不定|說不定|shuo1 bu5 ding4]]
- 不定式 bùdìngshì infinitivethe base form of a verb which does not show tense or person, such as "to eat" in English
- 游移不定 yóuyíbùdìng to vacillateto waver or hesitate; to be indecisive or constantly change one's mind
- 动荡不定 dòngdàngbùdìng unrestturbulent and unstable; a state of social or political upheaval and volatility
- 不定期 bùdìngqī irregularly schedulednot at fixed or regular times; unscheduled; irregular
- 动摇不定 dòngyáobùdìng vacillatingwavering and indecisive; unstable or shaking without a fixed position
- 不定冠词 bùdìngguàncí indefinite articleA word used with a noun to indicate a non-specific person or thing; for example, "a" or "an" in English.
- 不定方程 bùdìngfāngchéng indeterminate equation(math) an equation containing two or more unknown variables which generally has an infinite number of solutions
- 心魂不定 xīnhúnbùdìng distractedunsettled in spirit; feeling restless or unable to concentrate
- 拿不定主意 nábudìngzhǔyi to be unable to decideTo be unable to make up one's mind; to be uncertain or hesitant in making a decision.
- 萍踪不定 píngzōngbùdìng to drift like duckweedUsed to describe a life of wandering or having no fixed location, where one's movements are as unpredictable as duckweed drifting on water.
- 不定性 bùdìngxìng uncertaintyuncertainty; indeterminacy; inconstancy
- 不定元 bùdìngyuán indeterminate elementindeterminate element in mathematics, often represented by the symbol x
- 不定时炸弹 bùdìngshízhàdàn time bombtime bomb; a hidden danger that can cause damage or disaster at any moment
- 不定积分 bùdìngjīfēn indefinite integralindefinite integral; antiderivative
- 不定穴 bùdìngxué ashi pointacupuncture point with no fixed location, identified by pain or tenderness upon pressure
- 不定词 bùdìngcí infinitiveThe basic form of a verb that is not limited by person or number.
- 不定形 bùdìngxíng indeterminate form(mathematics) an indeterminate form
- 保不定 bǎobudìng most likelymost likely; probably; more likely than not; it's quite possible
- 反覆不定 fǎnfùbùdìng changeablechangeable; fickle; constantly changing one's mind
- 惊疑不定 jīngyíbùdìng be anxious and doubtfulto be gripped by a mixture of shock and suspicion; to be in a state of frightened uncertainty
- 把持不定 bǎchíbùdìng indecisiveunable to control oneself or stay firm; irresolute or shaky in one's will
- 拿不定 nábudìng to be undecidedto be unable to decide; to be unsure or uncertain about something