accent grave (`)
Definition - The French name for the ` diacritical mark, which is used in, for example, written Breton, Catalan, Dutch, French, and Greek.

Example -
In English it is sometimes used to show that ed is to be pronounced as a distinct syllable, as in learnèd and hallowèd.

Etymology -
The word grave means "heavy" in French, and it derives from the Latin gravis, weighty or serious or heavy.

Oxford English Dictionary -
Its first citation is from 1609:
" The circumflex is … contrary to the acute, for it begins with the acute, and ends with the grave."
(Douland Ornith. Microl. 70)

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