the.com/recoil

Newton's third law, delivered straight to your shoulder.

means to jerk or flinch backward suddenly, whether from a gun's kick or from something that disgusts or frightens you

from From Old French 'reculer,' to retreat or go backward, built from 're-' (back) plus 'cul' meaning the rear or backside (from Latin 'culus'). So the word's literal skeleton is 'to go back on your backside' — a shrinking retreat that English borrowed in the 1300s, applying it first to armies and bodies falling back, and later, naturally, to springing weapons and springing emotions alike.

physics
equal and opposite reaction to firing a projectile
mitigation
heavier guns and muzzle brakes redirect gas to reduce kick
etymology
from old french reculer, to draw back
emotional use
also means flinching away from something upsetting
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