Terugslag

Terugslag is a Dutch noun meaning the backward movement or reaction following an action. The term is used in several contexts: in physics and engineering to describe recoil or kickback, in social science to describe backlash after reforms, and in everyday language for any sudden backward motion. The word combines terug (back) and slag (blow).

In firearms, terugslag refers to recoil: when a cartridge fires, momentum is transferred to the bullet and expanding gases, causing the firearm to move backward. The strength of the terugslag depends on bullet mass, powder charge, velocity, and the firearm’s mass and design. Designers reduce it with heavier frames, muzzle devices, or recoil springs; operators control it through stance and grip.

In mechanical engineering, terugslag can describe the sudden backward force or motion of a component when energy is released. It may affect accuracy, control, and safety, and is addressed by dampers, springs, or other energy-absorbing elements. The term is also used colloquially for the kickback experienced when using tools such as saws or drills.

In social or political discourse, terugslag denotes a backlash against reforms, policies, or social changes, often mobilizing opposition, protest, or counter-measures.

See also: recoil, backlash, kickback.