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labile |ˈleɪbɪl, ˈleɪbʌɪl|
adjective technical
liable to change; easily altered: persons whose blood pressure is more labile will carry an enhanced risk of heart attack | we may be the most labile culture in all history.
• of or characterized by emotions which are easily aroused, freely expressed, and tend to alter quickly and spontaneously: mood seemed generally appropriate, but the patient was often labile.
• Chemistry easily broken down or displaced: the breakage of labile bonds | [in combination] : a heat-labile protein.
DERIVATIVES
lability |ləˈbɪlɪti| noun
ORIGIN
late Middle English (in the sense ‘liable to err or sin’): from late Latin labilis, from labi ‘to fall’.