Sisyphean
adjective formal uk/ˌsɪs.ɪˈfiː.ən/ us/ˌsɪs.ɪˈfiː.ən/
西西弗斯式的，艰苦而无尽头的，徒劳的
used to describe a task that can never be completed
Trying to completely eliminate doping from sport is a Sisyphean task. 试图在体育界彻底杜绝兴奋剂是一项西西弗式的任务。
Many Manhattan residents find themselves in a Sisyphean cycle of buying and renovating. 许多曼哈顿居民发现自己陷入了买房和装修的西西弗式循环。