Definition of imperturbable adjective from the Oxford Advanced American Dictionary

 

imperturbable

 adjective
adjective
NAmE//ˌɪmpərˈtərbəbl//
 
(formal)
 
jump to other results
not easily upset or worried by a difficult situation; calm His normally imperturbable assistant burst into tears.
imperturbability
 
jump to other results
NAmE//ˌɪmpərˌtərbəˈbɪlət̮i//
 
noun [uncountable]
imperturbably
 
jump to other results
NAmE//ˌɪmpərˈtərbəbli//
 
adverb
See the Oxford Advanced Learner's Dictionary entry: imperturbable