1. jumar - Noun
2. jumar - Verb
English Wikipedia has an article on:jumarWikipedia
jumar (plural jumars)
(climbing) A device, used to clip on a rope, that tightens when weight is applied, thus allowing the rope to be climbed.
jumar (third-person singular simple present jumars, present participle jumaring or jumarring, simple past and past participle jumared or jumarred)
(intransitive) To climb using this device.