refrigerate (v.)

1530s, "to cool, make cool," a back-formation from refrigeration, or else from Latin refrigeratus, past participle of refrigerare "make cool or cold." Related: Refrigerated; refrigerating. Earlier words in the sense of "to make cold, to cool" were infrigiden, infrigidate (both early 15c.). Middle English had refroiden "to cool" (anger), mid-15c., from Old French refroider.