caver

 Longman Dictionary of Contemporary English 5++朗文当代英语 5++LDOCE 5++朗文 5++cav·er /ˈkeɪvə $ -ər/ noun [countable] British English  someone who goes into caves deep under the ground as a sport 〔深入地下作为一项运动的〕探察洞穴者 SYN American English spelunker

cav·er nounChineseSyllable  

caver
cav‧er /ˈkeɪvə $ -ər/ noun [countable] British English
someone who goes into caves deep under the ground as a sport
   SYN  spelunker American English

caverBrE /ˈkeɪvə(r)/ 🔊NAmE /ˈkeɪvər/ 🔊 (also pot·holer BrE ) (NAmE spe·lunk·er) nouna person who goes into caves under the ground as a sport or hobby 探察洞穴者（以此为体育运动或业余爱好）  ➡  compare speleologist