diphthong

A similar trajectory occurred with other Southern accent features, such as the shifting of the diphthong in "right" to a single vowel sound closer to "raht" and the spread of Southern drawl – with lengthening of vowels, in which words such as "that" are pronounced more like "thaa-uht."

Leave it to Cher to rock a diphthong.

I have no broad, clean and tidy statements to make about economic life in Dublin today, however: there are students in the university with designer gear and accents a diphthong short of the Queen’s, and students who come in early on commuter buses from outlying towns because Dublin rents are viciously unaffordable.

For more than a century, the long, stately rows of Encyclopædia Britannica have been a fixture on the shelves of many an educated person’s home—the smooshed-together diphthong in the first word a symbol of old-world erudition and gravitas.

Some aspects of the pronunciation, such as the diphthong in words like "fight", are becoming more marked.