labile

Adjective

  1. (chemistry, physics, biology) readily undergoing change or breakdown
  2. liable to change; “an emotionally labile person”
  1. 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

Psychology of or characterized by emotions that are easily aroused or freely expressed, and that tend to alter quickly and spontaneously; emotionally unstable mood seemed generally appropriate, but the patient was often labile

Chemistry easily broken down or displaced the breakage of labile bonds | a heat-labile protein