7 letters · 13 points in Scrabble
verb explore natural caves
originFrom Middle English spelunke, from Old French spelonque and/or Latin spelunca, from Ancient Greek σπῆλυγξ (spêlunx, “cave”), related to σπέος (spéos). Cognates include Middle Dutch spelunke, spelonke, German Spelunke.
Etymology from Wiktionary, CC BY-SA 3.0