- 不稳定 bùwěndìng unstableunstable; shaky; not steady; instability
- 拿不稳 nábuwěn unable to hold steadyCannot hold something steadily; to be on shaky ground or in a precarious situation
- 不稳性 bùwěnxìng instabilityinstability; the state of being unstable or unsteady
- 不稳平衡 bùwěnpínghéng unstable equilibriumthe state of a physical system where any slight disturbance results in a move further away from its initial position
- 嘴不稳 zuǐbuwěn cannot keep a secretDescribes a person who is prone to leaking secrets because they like to talk too much; also written as [[嘴不严|嘴不嚴|zui3 bu4 yan2]]
- 坐不稳 zuòbuwěn unable to sit steadilyCannot sit securely or steady; unsteady, often describing a defective chair or a person who cannot keep still.
- 手不稳 shǒubùwěn light-fingered(dialect) likely to steal or pilfer; having a habit of stealing or shoplifting
- 不稳定平衡 bùwěndìngpínghéng unstable equilibrium (physics)A state where an object or system in equilibrium, when slightly disturbed, cannot return to its original position or state