mutable
adjective
1. capable of or tending to change in form or quality or nature
- a mutable substance
- mutable weather patterns
- a mutable foreign policy
Similar word(s): changeable
2. prone to frequent change; inconstant
- the fickle and mutable nature of truth
- the mutable ways of fortune
Similar word(s): inconstant
3. tending to undergo genetic mutuation
- It is likely, too, that the chromosomes of all eubacteria are as mutable as that of E. coli
Similar word(s): changeable, changeful