mu·ta·ble /ˈmjutəbəl/
  (a.)易變的,性情不定的
  mu·ta·ble /ˈmjutəbəl/ 形容詞
  Mu·ta·ble a.
  1. Capable of alteration; subject to change; changeable in form, qualities, or nature.
     Things of the most accidental and mutable nature.   --South.
  2. Changeable; inconstant; unsettled; unstable; fickle. “Most mutable wishes.”
  Syn: -- Changeable; alterable; unstable; unsteady; unsettled; wavering; inconstant; variable; fickle.
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  mutable
       adj : capable of or tending to change in form or quality or
             nature; "a mutable substance"; "the mutable ways of
             fortune"; "mutable weather patterns"; "a mutable
             foreign policy" [syn: changeable] [ant: immutable]