enrage (v.) Look up enrage at Dictionary.com
late 14c. (implied in enraged), from Old French enragier "go wild, go mad, lose one's senses," from en- "make, put in" (see en- (1)) + rage "rabies, rage" (see rage (n.)). Related: Enraging. Intransitive only in Old French; transitive sense is oldest in English.