diphthong

Leave it to Cher to rock a diphthong.

From Washington Post ● Feb. 20, 2019

These lines, for example, seem to evoke a police raid on a Vampire Weekend karaoke contest:  Duke seizes Florence & the diphthong town, Quite a surprise to young fops & leeches.

From New York Times ● Jul. 23, 2012

Housman's judgment of that ambitious pagan could be superimposed on the Mailer of Pieces and Pontifications without changing a diphthong: his "besetting sin is the use of words too forcible for his thoughts."

From Time Magazine Archive

For the rest of his life, Russell wrote under that diphthong.

From Time Magazine Archive

In the same way short e tended towards i, so that the contraction of ε + ε gave ει, which was not a diphthong but a close ē-sound.

From Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 4 "Grasshopper" to "Greek Language" by Various

All of the letters are in lower case and there are no double consonents, but there are "diphthongs, triphthongs, quadriphtongs and even quintiphthongs", which are combined vowel sounds.

From Fox News ● May 15, 2019

He erodes consonants, turns simple vowels into unpredictable diphthongs, and takes each new sentence as an opportunity for rococo improvisation.

From The New Yorker ● May 6, 2019

Yet musical-theater singing tends to be brighter and less resonant, with greater pronunciation of diphthongs, rather than the purer vowels of opera singing, explained Ms. Voigt’s co-star Rod Gilfry, who plays the sharp-shooter Frank Butler.

From New York Times ● Jul. 14, 2011

The gag: Schaffer's accent is classic old-style Noo Yawk, all diphthongs and mobster cadences.

From The Guardian ● Apr. 27, 2010

The diphthongs æ and œ are sounded like e: as cædo, pronounced ce'do.

From New Word-Analysis by William Swinton