fastened

Fastened is the past tense and past participle of the verb fasten, meaning to attach, secure, or close something. As an adjective, fastened describes an object or a closure that has already been secured or fixed in place.

Common uses include clothing and accessories (buttons, zippers, hooks, clasps), hardware and assemblies (bolts, screws, rivets, clamps), and closures on containers, doors, lids, and belts. In safety contexts, items such as seat belts, harnesses, and protective gear are described as fastened to indicate they are secured properly.

Grammatically, fastened can be used predicatively ("The door is fastened") or attributively in phrases like "a fastened strap." It often appears with prepositional phrases to describe how it was secured, such as "fastened with a buckle" or "tightly fastened."

Etymology: the word derives from the verb fasten, which traces back to Old English fæstnian or related Germanic roots, with the broad sense of making firm or secure. The term is related to other forms such as fastening and fastener.

See also: fasten, fastening, fastener. Related ideas include terms like secure, fix, and attach, which describe similar actions of making something stable or immobile.