jumar

British  

/ ˈdʒuːmə /

noun

1. Also called: jumar clamp.  a clamp with a handle that can move freely up a rope on which it is clipped but locks when downward pressure is applied

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verb

1. to climb (up a fixed rope) using jumars

Etymology

Origin of jumar

C20: Swiss name

Example Sentences

Tommy dropped an essential piece of gear, a jumar, off the wall.

From National Geographic • Jun. 6, 2018

Now, as Beidleman clung precariously to the rock 100 feet above the clients, the overly eager Yasuko clamped her jumar to the dangling rope before the guide had anchored his end of it.

From "Into Thin Air" by Jon Krakauer

The cam allows the jumar to slide upward without hindrance, but it pinches the rope securely when the device is weighted.

From "Into Thin Air" by Jon Krakauer

Had he not been clipped in with a jumar he would have certainly fallen to his death.

From "Into Thin Air" by Jon Krakauer

I picked up the bottom end of it, attached my jumar* to the slightly frayed line, and began to climb.

From "Into Thin Air" by Jon Krakauer