the.com/pincer

means A pincer is a gripping tool or claw with two hinged jaws that close on something from opposite sides — and by extension, a military move that squeezes an enemy from two flanks at once.

from From Old French 'pincier,' meaning to pinch or squeeze, which traces back to a presumed Vulgar Latin root 'pinctiare.' The crab's or lobster's claw borrowed the name for its pinching action, and from that image the word crawled into warfare — a 'pincer movement' being two attacking forces closing like claws around a trapped target.