(每日一词）reversal

reversal /rɪˈvɜːsəl/ n. 反向；倒转；倒退；推翻; 挫折；失败

meaning: the act of changing or making something change to its opposite 

1) 前缀：re-往回（return)

2) 词根：vers-转动(R档—reverse 倒退）

3) 后缀：-al 名词后缀(animal) 

e.g. He demanded a reversal of the previous decision. 他要求撤销原来的决定。

e.g. We have stuffed a couple of minor reversals. 我们遭遇了几次小挫折。