the.com/accessory

means A smaller item added to something main—either a stylish extra you wear or carry, or, in law, a person who helps with a crime without doing the main deed themselves.

from From Latin accedere, 'to approach or go toward'—the same root as 'access.' It passed through medieval Latin accessorius ('additional, supplementary') into French and then English around the 1400s, originally as a legal term for a thing or person subordinate to a main matter. The fashion sense—earrings, bags, the stuff that completes an outfit—is a much later extension of the same idea: something that approaches the main thing, walks beside it, but isn't it.