diphthongize

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US/ˈdɪfθɑŋaɪz/US/ˈdɪp-/UK/ˈdɪfθɒŋaɪz/

verb

To change to a diphthong, as by inserting or removing a vowel.

Similar
diphthongise
Scrabble 31
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Meanings

verbdiphthongize (third-person singular simple present diphthongizes, present participle diphthongizing, simple past and past participle diphthongized)

present singular third person diphthongizes · participle present diphthongizing · participle past diphthongized · past diphthongized · alternative diphthongise

  1. transitivehuman sciencesTo change to a diphthong, as by inserting or removing a vowel.

    Some of these [monophthongs] will be diphthongised under the influence of following sounds.

    2022, Daisy L. Neijman, Icelandic: An Essential Grammar, Routledge, →ISBN, page 5
  2. intransitivehuman sciencesTo become a diphthong.

Synonyms & antonyms

verbchange from a simple vowel to a diphthong

Similar
diphthongise
Broader
switchshiftchange

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

From diphthong + -ize.

Full word history & related roots →

Translations

Czech diftongizovat
  • diftongizovatto change to a diphthong
French diphtonguer
  • diphtonguerto become a diphthong
German diphthongieren, diphthongiert werden
  • diphthongierento change to a diphthong
  • diphthongiert werdento become a diphthong
Italian dittongare, dittongare
  • dittongareto change to a diphthong
  • dittongareto become a diphthong
Japanese 二重母音化する
  • 二重母音化する (nijūboinka suru)to become a diphthong
Portuguese ditongar, ditongar
  • ditongarto change to a diphthong
  • ditongarto become a diphthong
Slovak diftongizovať, diftongizovať sa
  • diftongizovaťto change to a diphthong
  • diftongizovať sato become a diphthong
Spanish diptongar, diptongar
  • diptongarto change to a diphthong
  • diptongarto become a diphthong
Swedish diftongera, diftongera
  • diftongerato change to a diphthong
  • diftongerato become a diphthong
Cite this entry
APA

diphthongize. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/diphthongize

MLA

“diphthongize.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/diphthongize. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “diphthongize,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/diphthongize.

Source: diphthongize on Wiktionary, CC BY-SA 4.0.