The difference between Anaptyxis and Epenthesis
When used as nouns, anaptyxis means the epenthesis (insertion) of a vowel, whereas epenthesis means the insertion of a phoneme, letter, or syllable into a word, usually to satisfy the phonological constraints of a language or poetic context.
check bellow for the other definitions of Anaptyxis and Epenthesis
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Anaptyxis as a noun (phonetics):
The epenthesis (insertion) of a vowel; svarabhakti: for example, the middle ‘' in , or use of infixes and in coining English words on classical roots.
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Epenthesis as a noun (phonetics, prosody):
The insertion of a phoneme, letter, or syllable into a word, usually to satisfy the phonological constraints of a language or poetic context.