mutable
- Capable of or subject to change or alteration. adjectiveThe mutable nature of fashion trends means that styles change rapidly.Her mutable moods made it difficult to predict how she would react.
- Liable to change or be changed; inconstant or fickle. adjectiveThe mutable weather in the region requires residents to be prepared for sudden changes.His mutable opinions on the matter made it hard for others to trust his judgment.