cut (someone) to the quick

US /kʌt ˈsʌm.wʌn tu ðə kwɪk/
UK /kʌt ˈsʌm.wʌn tu ðə kwɪk/
"cut (someone) to the quick" picture
1.

to deeply hurt someone's feelings

:
Her harsh words cut him to the quick.
The criticism cut her to the quick, even though she tried not to show it.