monophthongize

• monophthongise

From monophthong +‎ -ize.

monophthongize (third-person singular simple present monophthongizes, present participle monophthongizing, simple past and past participle monophthongized)

1. (transitive, phonetics) To change to a monophthong (as by removing a vowel).
   • 2025, Cid Swanenvleugel, The Pre-Roman Elements of the Sardinian Lexicon, page 132:

     Inherited -au- was monophthongized to -a- in Sardinian. These forms must therefore go back to […] *aCurri, with an elided consonant.

2. (intransitive, phonetics) To become a monophthong.

• monophthongization