(v.t.&i.) To change into a diphthong, as by affixing another vowel to a simple vowel.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). diphthongize. Retrieved September 21, 2026, from http://smartdefine.org/diphthongize/definitions/1997878 |
| Chicago | Webster's. 2011. "diphthongize" http://smartdefine.org/diphthongize/definitions/1997878 (accessed September 21, 2026). |
| Harvard | Webster's 2011, diphthongize, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/diphthongize/definitions/1997878>. |
| MLA | Webster's. "diphthongize" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/diphthongize/definitions/1997878> |