Raisin
Middle English: from Old French, ‘grape’, from an alteration of Latin racemus ‘grape bunch’.
wiktionary
From Middle English raysyn, borrowed from Anglo-Norman reysin(“grape, raisin”), from Vulgar Latin racīmus, from Latin racēmus. Cognate with Persian رز (raz, “vine”). Doublet of raceme.
etymonline
raisin (n.)
"dried sweet grape," c. 1300, from Anglo-French raycin (late 13c.), Old French raisin "grape; raisin," from Vulgar Latin *racimus, alteration of Latin racemus "cluster of grapes or berries" (also source of Spanish racimo, Italian racemo), probably a loan-word from the same ancient lost Mediterranean language that gave Greek rhax (genitive rhagos) "grape, berry." In Middle English the word also could be used of grapes themselves. Dutch razun also is from French; German Rosine is from an Old French variant form.
