单词	jumar
释义	jumar /ˈdʒuːmə / Climbing noun A clamp that is attached to a fixed rope and automatically tightens when weight is applied and relaxes when it is removed. verb (jumars, jumaring, jumared) [no object] Climb with the aid of a jumar: the second climber jumars up the fixed rope... I was at the end of fixed ropes and did not wait for Ara to belay me who was still jumaring at the base of the wall. Even so, climbers should be schooled in basic rock climbing and comfortable with jumaring and rappelling. While the others sneaked in a last route or two, Anne ascended a static line, collecting her camera and jumaring toward the sky. Origin 1960s: originally in Swiss use, of unknown origin.
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