tiring

Managing a group of thirty energetic kindergarten students for eight hours is extremely tiring.

(Chinese) 管理三十名精力充沛的幼儿园学生八小时是非常累人的。

The athlete found the daily training schedule to be tiring but necessary for winning the gold medal.

(Chinese) 运动员觉得每天的训练计划很累人，但为了赢得金牌这是必须的。