someone who climbs up rocks, mountains or buildings without using any ropes or other equipment

中文解释

（不使用绳索等保护设备的）徒手攀登者，无保护攀登者 As one of the world\'s top free soloists, Reardon was known for numerous climbing accomplishments. 作为世界上顶尖的徒手攀岩者之一，里尔登以其众多的攀岩成就而闻名。