c.1400 (implied in repercussive) "act of driving back," from M.Fr. répercussion (14c.), from L. repercusionem (nom. repercussio), from repercussus, pp. of repercutere "to strike or beat back," from re- "back" + percutere "to strike or thrust through" (see percussion). Meaning "reverberation, echo" first recorded 1595; the metaphoric extension is recorded from 1625.