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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
PIE word *dwóh₁ Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *dwi- Proto-Hellenic *dwi- Ancient Greek δῐ- (dĭ-) Ancient Greek φθέγγομαι (phthéngomai) Ancient Greek φθόγγος (phthóngos) Ancient Greek δῐ́φθογγος (dĭ́phthongos)der. Latin diphthongusbor. French diphtongueder. English diphthong From French diphtongue, from Late Latin diphthongus, from Ancient Greek δίφθογγος (díphthongos, “two sounds”), from δίς (dís, “twice”) + φθόγγος (phthóngos, “sound”).
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Classic usage
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