different between diphthong vs dipthong

English

From French diphtongue, from Ancient Greek ????????? (díphthongos, “two sounds”), from ??? (dís, “twice”) + ??????? (phthóngos, “sound”).

(UK) IPA^(key): /?d?f???(?)/; (proscribed) /?d?p???(?)/
(US) IPA^(key): /?d?f???/; (proscribed) /?d?p???/
(CA; US, in accents with the cot-caught merger) IPA^(key): /?d?f???/; (proscribed) /?d?p???/

diphthong (plural diphthongs)

(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.
Coordinate terms: monophthong, triphthong
(rare) A vowel digraph or ligature.
- 1854, Robert Bigsby, Historical and Topographical Description of Repton, in the County of Derby, Woodfall and Kinder, page 47:
  And he might have written the name, also, with the diphthong æ, as well as the single vowel, in the initial syllable, throughout all the preceding forms.
- 1860, Joseph E. Worcester, An Elementary Dictionary of the English Language, A New Edition, Swan, Brewer, and Tileston (publishers), page 12:
  An improper diphthong has only one of the vowels sounded; as, ea in heat, oa in coal.
- 1874, Theophilus Dwight Hall, A Child’s First Latin Book, John Murray (publisher), page 3:
  The diphthong ae is sounded like ? (§7); that is, it has the sound of ey in they.

dipthong

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