Mutable

What does MUTABLE mean?

1. adjective

   capable of or tending to change in form or quality or nature

   “a mutable substance”

2. adjective

   prone to frequent change; inconstant

   “the fickle and mutable nature of truth”

3. adjective

   tending to undergo genetic mutuation

   “It is likely, too, that the chromosomes of all eubacteria are as mutable as that of E. coli”

Definitions from WordNet 3.1, Princeton University.