spe·lunk·ing
noun/spəˈlʌŋkɪŋ/
/spəˈlʌŋkɪŋ/
(North American English) (especially British English caving, British English potholing)
[uncountable]- the sport or activity of going into caves under the ground
enlarge image洞穴探察；洞穴探险 Word Origin1940s: from obsolete spelunk ‘cave’ (from Latin spelunca) + -ing.