deactivate (v.)Related entries & more
acting (adj.)Related entries & more
1590s, "putting forth activity, active," present-participle adjective from act (v.). Meaning "performing temporary duties" is from 1797.
efficient (adj.)Related entries & more
late 14c., "making, producing immediate effect, active, effective," from Old French efficient and directly from Latin efficientem (nominative efficiens) "effective, efficient, producing, active," present participle of efficere "work out, accomplish," from assimilated form of ex "out" (see ex-) + facere "to do" (from PIE root *dhe- "to set, put"). Meaning "productive, skilled" is from 1787. Related: Efficiently.
reactivate (v.)Related entries & more
co-act (v.)Related entries & more
-emeRelated entries & more
in linguistics, noted as an active suffix and word-formation element from 1953; from French -ème "unit, sound," from phonème (see phoneme).
chipper (adj.)Related entries & more
1834, "lively, nimble, active, brisk," American English, from northern British dialectal kipper "nimble, frisky," the origin of which is obscure.
frisky (adj.)Related entries & more
night-hawk (n.)Related entries & more
demobilize (v.)Related entries & more
"to send home (troops) as not required for active service," 1876, probably a back-formation from demobilization (q.v.). Related: Demobilized; demobilizing.