kickback
UK: ˈkɪkbæk | US: ˈkɪkˌbæk
n. 1. A sudden, forceful recoil (e.g., of a gun or machine).
n. 2. A secret or illegal payment made in return for a favor or service (often corrupt).
v. (rare) To recoil or react violently.
The word "kickback" emerged in the early 19th century, combining "kick" (from Old English ciccan, meaning "to strike with the foot") and "back" (Old English bæc, denoting reversal). Originally describing physical recoil (e.g., firearms), it later evolved metaphorically in the 20th century to describe illicit payments—implying a "forceful return" of money in corrupt transactions. The morphemes retain their literal meanings while adapting to figurative use.
The rifle’s kickback startled the inexperienced shooter.
The contractor was accused of accepting kickbacks from suppliers.
The engine’s kickback caused the machine to jerk violently.
Investigators uncovered a kickback scheme involving city officials.
(Rare verb use) The motor kicked back when he tried to start it.