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

1.
pagar caro, sofrer as consequências
to suffer greatly as a result of something you have done
:
•
He will pay dearly for his mistakes.
Ele vai pagar caro pelos seus erros.
•
If you betray their trust, you will pay dearly.
Se você trair a confiança deles, vai pagar caro.