mid-14c., appropren, "acquire possession or control, to appropriate, take possession of," from Old French apropriier "annex; make fit or suitable" (12c., Modern French appropre), from Late Latin appropriare "make one's own" (see appropriate (v.)).
1580s, "to watch, guard, or keep order; to govern," from French policer, from police (see police (n.)). The original sense is obsolete. The meaning "to control or keep order in by means of police" is from 1837; figurative use by 1885. Related: Policed; policing.
fem. proper name, from Greek sōphrōnia, from sōphrōn (genitive sōphrōnos) "discreet, prudent, sensible, having control over sensual desires, moderate, chaste," literally "of sound mind," from sōs "safe, sound, whole" + phrēn "heart, mind" (see phreno-).