Orthoepy

Orthoepy means the doctrine of correct pronunciation within a specific oral tradition. The term is from the Greek ὀρθοέπεια, from ὀρθός orthos "correct" and ἔπος epos "speech." The antonym is cacoepy "bad or wrong pronunciation". The pronunciation of the word orthoepy itself varies widely; the OED recognizes the variants /ˈɔːθəʊˌiːpi/, /ˈɔːθəʊˌɛpi/, /ˈɔːθəʊɨpi/, /ɔːˈθəʊɨpi/ for British English and /ɔˈθoʊəpi/ for American English. The tetrasyllabic pronunciation is sometimes indicated with a diaresis, orthoëpy.