pay dearly
US /peɪ ˈdɪrli/
UK /peɪ ˈdɪrli/

1.
付出沉重代价, 吃大亏
to suffer greatly as a result of something you have done
:
•
He will pay dearly for his mistakes.
他将为自己的错误付出沉重代价。
•
If you betray their trust, you will pay dearly.
如果你背叛了他们的信任,你将付出沉重代价。
付出沉重代价, 吃大亏
to suffer greatly as a result of something you have done