repercussion Look up repercussion at Dictionary.com
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.