the.com/camo

means A pattern of mottled colors and shapes designed to blend into surroundings and visually break up an outline.

from Short for 'camouflage,' which English borrowed in the WWI era from French camoufler, military slang meaning to disguise — itself likely drawing on Italian camuffare, 'to disguise,' possibly tangled up with camuffare's own roots in 'muffle' or steam/smoke (camouflet, a puff of smoke), and also echoing French camouflet, a word for a slight or snub, as if disguise were a kind of sly trick played on the enemy's eyes. The clipped 'camo' is a 20th-century shorthand, born once the gear itself became common enough to need a quick, casual name.