poniziti

1. to humiliate
   Ponizio ju je pred svim kolegama. — He humiliated her in front of all her colleagues.
   Domaćini su ponizili goste sa pet golova razlike. — The home team humiliated the visitors by five goals.
2. (poniziti se) to demean oneself; to humble oneself
   Nije htela da se ponizi i zamoli ga za pomoć. — She refused to demean herself by asking him for help.

The imperfective is ponižavati; often used with pred + instrumental (“in front of”).