MUTABLE Meaning of MUTABLE in English [ 'mju:təb(ə)l ]■ adjective liable to change. ↘ literary inconstant in one's affections.Derivativesmutability noun OriginME: from L. mutabilis , from mutare 'to change'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004