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Definition of diphthong noun from the Oxford Advanced Learner's Dictionary

diphthong

noun

/ˈdɪfθɒŋ/,

/ˈdɪpθɒŋ/

/ˈdɪfθɔːŋ/,

/ˈdɪpθɔːŋ/

(phonetics)

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a combination of two vowel sounds or vowel letters, for example the sounds /aɪ/ in pipe /paɪp/ or the letters ou in doubt compare monophthong, triphthong
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Word Originlate Middle English: from French diphtongue, via late Latin from Greek diphthongos, from di- ‘twice’ + phthongos ‘voice, sound’.

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See diphthong in the Oxford Advanced American DictionarySee diphthong in the Oxford Learner's Dictionary of Academic English

Check pronunciation: diphthong

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verb

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