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diphthong noun

  /ˈdɪfˌθɑŋ/ , /ˈdɪfˌθɒŋ(ɡ)/ , /ˈdɪfˌθɔŋ/ , /ˈdɪpˌθɑŋ/<a:cot-caught> , /ˈdɪpˌθɒŋ(ɡ)/ , /ˈdɪpˌθɔŋ/ , /;/
  • (phonetics) A complex vowel sound that begins with the sound of one vowel and ends with the sound of another vowel, in the same syllable.
 diphtongue

diphthongize verb

  /ˈdɪfθɑŋaɪz/ , /ˈdɪfθɒŋaɪz/ , /ˈdɪp-/
  • (transitive, phonetics) To change to a diphthong, as by inserting or removing a vowel.
 diphtonguer

diphthongization noun

  • The process by which a single vowel sound (monophthong) shifts to a two-vowel vocalization (diphthong).
 diphtongaison
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