"Peter. . . . 'rebukes' Jesus, as though he were trying to exorcise a demon"

Mk 8:32:  "Peter . . . began to rebuke [(form of ἐπιτιμάω)] him.  But . . . [Jesus] rebuked [(form of ἐπιτιμάω)] Peter, and said, 'Get behind me, Satan!"

Mk 1:25:  "But Jesus rebuked [(form of ἐπιτιμάω) the unclean spirit]. . . ."
Mk 9:25:  "he rebuked [(form of ἐπιτιμάω)] the unclean spirit. . . ."