also CAFART, CAFFARD
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French cafard, caphard, of doubtful origin: some have proposed to identify it with Catalan cafre infidel, Spanish, Portugese cafre cruel, which are apparently adapted from Arabic kāfir
From: The Works of Mr. Francis Rabelais
...of the Lives, Heroic Deeds, and Sayings of Gargantua and his Sonne Pantagruel
Translated into English 1653, Vol. I.
Chapter XLIV. How the Monk rid himself of his Keepers, and how Picrocholes
Forlorne Hope was defeated. P. 132