mountaineering

n [U] climbing mountains (as a sport) 登山（运动）: [attrib 作定语] a mountaineering expedition 登山探险.

mottle, mottled, motto, mould, mould (US mold), moulder (US molder), moulding (US molding), mouldy (US moldy), moult, moult (US molt), mound, mount, Mount Fuji, mountain, mountain ash, mountain chain, mountain range, mountain lion, mountain sickness, mountain side, mountaineer, mountainous, mountains, mountainside, mountebank, mounted, Mountie, mounting, mourn, mourner, mournful, mournfully, mournfulness, mourning, mouse, mouser, mousetrap, moussaka, mousse, Moussorgsky, moustache,