erstwhile /ˈɜːstˌwaɪl/

• 1. 

  ADJ You use erstwhile to describe someone that used to be the type of person indicated, but no longer is. 以前的; 往昔的 [正式] [ADJ n]

  例：

  He fled to Brazil with Gloria Lopez, an erstwhile friend of his wife's.

  他和他妻子以前的一个朋友葛洛莉亚·洛佩兹一起逃往巴西。