Meaning of rèn shū:
rèn shū
认输
Verb
to concede; to admit defeat
Zài bǐsài gāocháo shí, tā juédìng rènshū.
在比赛高潮时,他决定认输。
At the climax of the game, he decided to concede.
Zài bǐsài de zuìhòu yī kè, tā juédìng bù rènshū.
在比赛的最后一刻,他决定不认输。
At the last moment of the match, he decided not to admit defeat.