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

Ei remained a true diphthong in keeping the sound of both its elements; but the combination ei is often found merely as an equivalent for ī.

From Latin Pronunciation A Short Exposition of the Roman Method by Harry Thurston Peck

Even the big diphthongs that my grandfather’s years in the States had tamped down swelled back to their former glory in this company.

From The New Yorker ● Jul. 20, 2019

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

Mr. Pinsky is also a great jokester, a lover of puns, a supreme ironist and a serious carnivore, a lover of the meaty consonants and diphthongs of that Anglo-Teutonic goulash we call English.

From New York Times ● Oct. 4, 2010

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

From The Guardian ● Apr. 27, 2010

C is pronounced like k before a, o, u; and like s before e, i, y, and the diphthongs æ and œ: as cado, pronounced ka'do; cedo, pronounced se'do.

From New Word-Analysis by William Swinton