im·mu·ta·ble /ɪˈmjuːtəbəl/ adjectiveadj formal CHANGE FROM ONE THING TO ANOTHERnever changing or impossible to change 永恒的;不能改变的 This decision should not be seen as immutable. 不该把这个决定看成是不可改变的。
—immutably adverbadv
—immutability /ɪˌmjuːtəˈbɪləti/ noun [uncountableU]