posramiti

1. to shame; to put to shame
   Posramio je roditelje svojim ponašanjem na svadbi. — He shamed his parents with his behavior at the wedding.
   Svojom dobrotom posramila je sve nas. — Her kindness put us all to shame.
2. (posramiti se) to be ashamed; to feel ashamed
   Posramila se kad je shvatila svoju grešku. — She felt ashamed when she realized her mistake.

The imperfective is posramljivati; the participle posramljen means "ashamed, abashed".