means A small handheld or desktop device that drives a thin metal staple through sheets of paper and bends its legs flat to fasten them together.

from From "staple," a word with deep Germanic roots — Old English "stapol" meant a post, pillar, or prop, something fixed firmly in place, related to Old Norse and Dutch words for a support or pile. Over centuries "staple" came to mean a U-shaped metal fastener, and once machines were built in the 19th century to push these fasteners through paper, the tool earned the simple agent name "stapler" — literally the thing that staples.