mountaineer [mountaineers](one who climbs mountains for sport or pleasure) noun [UK: ˌmaʊn.tɪ.ˈnɪə(r)] [US: ˈmaʊn.tə.ˌnɪr]The insecurely anchored rope cost the mountaineer his life. = La cuerda anclada de forma insegura le costó al montañista su vida.