등산이 · 등산을 · 등산하다 (to hike)
hiking, mountain climbing
Example
아버지는 주말마다 등산을 가세요.
My father goes hiking every weekend.
Word parts
등 climb+산 mountain
Literally 'climbing a mountain' — a hugely popular weekend hobby in Korea.
Good to know
Both 등산을 하다 and 등산을 가다 (go hiking) are common.
Related words