gatillo
/ɡaˈtiʝo/ · B1 · noun · m
gun trigger
🔫 gato + -illo = little cat: a gun's trigger is literally its small cat
Spanish gato meant cat and also a gripping tool, like a clamp or jack. The -illo ending makes things small, so gatillo is the little gripper, the small catch your finger pulls to fire a gun.