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 /ɔrˈθoʊəpi/ for American English. The tetrasyllabic pronunciation is sometimes indicated with a diaresis,
orthoëpy. In English grammar, orthoepy is the study of correct pronunciation prescribed for Standard English. This is Received Pronunciation specifically, but other standards have emerged since the early 20th century. In ancient Greek, ὀρθοέπεια
orthoepeia had the wider sense of "correct diction", i.e. the correct pronunciation not just of individual words but of entire passages, especially of poetry, and the distinction of good poetry vs. bad poetry; the archaic English term for this subject is
orthology, and in this sense its opposite is solecism.