spelunking

spe lunk ing |spiˈləNGkiNG spəˈləŋkɪŋ | ▶noun the exploration of caves, esp. as a hobby. DERIVATIVES spe lunk er |-kər |noun ORIGIN 1940s: from obsolete spelunk ‘cave ’ (from Latin spelunca ) + -ing 1 .

spelunking

spelunking |spɪˈlʌŋkɪŋ | ▶noun [ mass noun ] N. Amer. the exploration of caves, especially as a hobby. DERIVATIVES spelunker noun ORIGIN 1940s: from obsolete spelunk ‘cave ’ (from Latin spelunca ) + -ing 1 .

spelunking

spe lunk ing /spɪlʌ́ŋkɪŋ /名詞 U ｟米 ｠洞窟 （どうくつ ）探検 .