An act of rejecting or dismissing something.

अस्वीकृति

English Usage: His rejection of the proposal surprised everyone.

Hindi Usage: उसकी प्रस्ताव की अस्वीकृति ने सभी को चौका दिया।

Describing something as unaccepted or unwanted.

अस्वीकृत

English Usage: She had a rejective attitude towards new ideas.

Hindi Usage: उसका नए विचारों के प्रति अस्वीकृत रवैया था।