carabiner

A carabiner is a common piece of mountain climbing equipment, a metal clip that allows climbers to link together ropes and harnesses. If you're learning to rock climb, you'll most likely use a carabiner.

Carabiners are vital for climbers and mountaineers to keep various pieces of equipment connected to each other, and thus to keep themselves safe while they're climbing. A carabiner can take various forms and shapes, but it's usually a metal oval, with a spring-loaded clip that stays closed unless it's pushed open. Say the word carabiner with an emphasis on the bin syllable, but pronounce it like bean.

Definitions of carabiner
1

n an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes

Synonyms:
karabiner, snap ring
Type of:
fastener, fastening, fixing, holdfast
restraint that attaches to something or holds something in place
hoop, ring
a rigid circular band of metal or wood or other material used for holding or fastening or hanging or pulling

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