— diphthongization , n.
/dif"thawng uyz', -guyz', -thong-, dip"-/ , v. , diphthongized, diphthongizing . Phonet.
v.t.
1. to change into or pronounce as a diphthong.
v.i.
2. to become a diphthong.
Also, esp. Brit., diphthongise .
[ 1865-70; DIPHTHONG + -IZE ]