(每日一词）excruciating

excruciating /ɪkˈskruːʃɪˌeɪtɪŋ/ adj. 极痛苦的

meaning: If you describe something as excruciating, you are emphasizing that it is extremely painful, either physically or emotionally.  

1) 前缀：ex-向外

2) 词根：cruc-表示十字(cross, crucial)

3) 后缀：-ating 形容词后缀（ate + ing, boring, interesting) 

e.g.  I was in excruciating pain and one leg wouldn't move.   我处于极度痛苦之中，一条腿动弹不了了。