ADJ
自发的；不由自主的
If something happens unbidden, it happens without you expecting or wanting it to happen.
例句
The name came unbidden to Cook's mind — Ashley Stoker...
库克的脑海里不由自主地闪现出一个名字——阿什利·斯托克。
Unbidden, his thoughts turned to his wife, who had died two years ago.
他不禁想到了两年前去世的妻子。