Firmly stating or demanding something; Not allowing for doubt or uncertainty

दृढ़

English Usage: She was insistent that we arrive on time.

Hindi Usage: वह इस बात पर दृढ़ थी कि हम समय पर पहुँचें।

The quality of being insistent; insistence.

अड़ा रहना

English Usage: His insistent was noted during the meeting.

Hindi Usage: उसकी अड़ाई बैठक के दौरान नोट की गई।