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

1.
pagar caro, sufrir las consecuencias
to suffer greatly as a result of something you have done
:
•
He will pay dearly for his mistakes.
Él pagará caro por sus errores.
•
If you betray their trust, you will pay dearly.
Si traicionas su confianza, pagarás caro.