spelunker
spe·lun·ker
noun
1.
a person who explores caves
Origin
From then-obsolete spelunk (noun) + -er. Coined by New England cave explorer Roger Charles Johnson in the 1930s.
Related words
Word family
Broader terms
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.