IMPERCEPTIBILITY Meaning of IMPERCEPTIBILITY in English imperceptibility BrE AmE ˌɪm pə ˌsept ə ˈbɪl ət i -ˌ•ɪ-, -ɪt i AmE \ ˌɪm p ə r ˌsept ə ˈbɪl ət̬ i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012