SUPEREROGATORY Meaning of SUPEREROGATORY in English supererogatory BrE AmE ˌsuːp ə r er ə ˈgeɪt ə r i ˌsjuːp-, ˌ••ɪ ˈrɒɡ ət•• AmE \ -ˈrɑːɡ ə tɔːr i -toʊr i Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012