OPEN-MOUTHED Meaning of OPEN-MOUTHED in English open-mouthed BrE AmE ˌəʊp ə n ˈmaʊðd ◂ ⇨-m-, § -ˈmaʊθt AmE ˌoʊp- ˈ••• Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012