that you cannot hear She spoke in an almost inaudible whisper. The whistle was inaudible to the human ear. opposite audible
NAmE//ɪnˌɔdəˈbɪlət̮i//
noun [uncountable] NAmE//ɪnˈɔdəbli//
adverbSee inaudible in the Oxford Advanced Learner's DictionaryCheck pronunciation: inaudible