Definition of immutable adjective from the Oxford Advanced Learner's Dictionary

 

immutable

 adjective
adjective
BrE BrE//ɪˈmjuːtəbl//
 
; NAmE NAmE//ɪˈmjuːtəbl//
 
(formal)
 
jump to other results
that cannot be changed; that will never change synonym unchangeable This decision should not be seen as immutable. Word Origin late Middle English: from Latin immutabilis, from in- ‘not’ + mutabilis, from mutare ‘to change’.
See the Oxford Advanced American Dictionary entry: immutable