Kickback

Noun

 * 1)  a clandestine payment in return for a favor; especially an illegal one
 * 2)  recoil; a sudden backward motion, usually in the direction of the operator.
 * 3)  an accident wherein an object being cut by a rotating blade or disk, such as a circular saw, is caught by the blade and thrown outward
 * 4)  a dangerous buildup of gas pressure at the wellhead
 * 5)  the board separating one bowling lane from another at the pit end
 * 6)  In contract bridge, an ace asking convention initiated by the first step above four of the agreed trump suit.

Thesaurus
abatement, agio, allowance, backfire, backlash, backlashing, bank discount, boomerang, bounce, bound, breakage, bribe, carom, cash discount, chain discount, charge-off, commission, compensation, concession, contrecoup, cut, deduction, depreciation, discount, drawback, kick, payola, penalty, penalty clause, percentage, premium, price reduction, price-cut, rebate, rebatement, rebound, rebuff, recalcitration, recoil, recoupment, reduction, refund, refundment, reimbursement, repayment, repercussion, repulse, resilience, restitution, return, reward, ricochet, rollback, salvage, setoff, share, spring, tare, time discount, trade discount, tret, underselling, write-off

Etymology
From +.

Translations

 * Portuguese:
 * Italian: contraccolpo sconto abbuono tangente bustarella mazzetta pizzo