come to the end of one’s tether; one’s schemes exhausted and strength worn out ❍ 他终于～，放弃了竞选。He eventually came to the end of his tether; and gave up his running. ❍ 本初计穷力尽，何尚不思投降？ (《三国演义》274) Benchu,your schemes are poor,your strength is exhausted,why still refuse to think of surrender?