mutable
/ˈmjuːtəbl/adjective
1- liable to change易变的; 很可能改变的：
the mutable nature of fashion.
时装的易变性。
1.1
- poetic/literary inconstant in one's affections〈诗/文〉反复无常的; 用情不专的：
youth is said to be fickle and mutable.
人们说青春是捉摸不定、反复无常的。
派生词
mutability
noun词源
late Middle English: from Latin mutabilis, from mutare 'to change'.