im ‧ mu ‧ ta ‧ ble /ɪˈmjuːtəb ə l/ BrE AmE adjective formal
never changing or impossible to change:
This decision should not be seen as immutable.
—immutably adverb
—immutability /ɪˌmjuːtəˈbɪləti, ɪˌmjuːtəˈbɪlɪti/ noun [uncountable]
im ‧ mu ‧ ta ‧ ble /ɪˈmjuːtəb ə l/ BrE AmE adjective formal
never changing or impossible to change:
This decision should not be seen as immutable.
—immutably adverb
—immutability /ɪˌmjuːtəˈbɪləti, ɪˌmjuːtəˈbɪlɪti/ noun [uncountable]
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012