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A pronunciation of a word that differs from the historically established one, arising on the basis of the word's spelling, as the introduction of a (t) into the pronunciation of often.
(Phonetics & Phonology) a pronunciation of a word that is influenced by the word's orthography and often comes about as the modification of an earlier or original rendering, such as the pronunciation of the British name Mainwaring, usually (ˈmænərɪŋ), as (ˈmeɪnˌwɛərɪŋ)
a pronunciation based on the spelling of a word, esp. one used in place of a traditional pronunciation, as (ˈweɪstˌkoʊt) instead of (ˈwɛs kət) for waistcoat.