1. plural of jumar; mechanical devices with cams that grip a rope, used by climbers to ascend ropes
Usage: climbing/mountaineering term; also called ascenders or mechanical ascenders

1. to climb a rope using jumars or similar mechanical ascenders
Usage: climbing/mountaineering term; third-person singular present tense or plural form

Examples

• The climber attached her jumars to the fixed rope before beginning the ascent.
• He jumars up the vertical rope with steady, practiced movements.
• Make sure your jumars are properly secured before you start climbing.
• She jumars quickly through the cave passage using her mechanical ascenders.
• The rescue team used jumars to reach the stranded climber on the cliff face.
• Professional mountaineers always inspect their jumars before a major expedition.