Equipment, clothing, or gear worn by someone, especially military gear or a soldier's outfit; usually used in plural.
From French accoutrement, from accoutrer + -ment suffix. The -ment suffix creates a noun for the equipment resulting from the action of accoutering.
Military academies still use 'accouterment' in official documents—but most people now say 'gear' or 'equipment,' making this one of those fancy words that clings to institutional language.
Complete word intelligence in one call. Free tier — 50 lookups/day.