chockstone

English

Kjeragbolten, a large chockstone or suspended boulder in Norway.

Etymology

chock +‎ stone. The climbing sense derives from the wedges' use as artificial chockstones.

Pronunciation

(UK) IPA^(key): /ˈtʃɒkstəʊn/
(General American) IPA^(key): /ˈtʃɑkstoʊn/

Noun

chockstone (plural chockstones)

A stone, ranging in size from a boulder to a pebble, which has become wedged in a vertical fissure or cleft.
A metal wedge or nut, threaded on a wire, used in rockclimbing for protection by wedging it into a crack in the rock.

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