Definition of monophthongization in English:

monophthongization

(also monophthongisation)

noun

  • The process by which a vowel sound changes, or is changed, to a monophthong; an instance or result of this.

Origin

Late 19th century; earliest use found in Henry Sweet (1845–1912), phonetician and comparative philologist. From monophthong + -ization, after diphthongization.

Pronunciation

monophthongization

/ˌmɒnə(f)θɒŋɡʌɪˈzeɪʃn/