IMPERTURBABILITY Meaning of IMPERTURBABILITY in English imperturbability BrE AmE ˌɪm pə ˌtɜːb ə ˈbɪl ət i -ɪt i AmE \ -p ə r ˌtɝːb ə ˈbɪl ət̬ i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012