enfriar
/enˈfɾjaɾ/ · B2 · verb
to cool, chill
🧊❄️ en + frío = put into the cold; same root as English frigid
Built from en- (into) + frío (cold), from Latin frigidus, which also gave English frigid and refrigerator. Same pattern as enfermar or endulzar: en- + adjective + -ar makes it a verb. The slang sense 'to kill' links to a corpse going cold.