Definition - The contracting of two syllables into one.

Example -
Pronouncing Cal-gar-y as Cal-gry.

Etymology -
In Greek the word means "a drawing together or contraction."

Oxford English Dictionary -
Its first citation is from 1577:
"Synæresis, when of two sillables in measuring, there is made but one, as when of this word vertuous, which hath .3. Sillables, we pronounce it with two, thus vertues, and likewyse righteous."
( Henry Peacham, the Elder, The Garden of Eloquence (1577), Eiij)

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