1. to decrease the frequency, intensity, or persistence of demanding something
The teacher asked the student to reduce insistence on leaving early.
A professora pediu ao aluno que reduzisse a insistência em sair mais cedo.
2. to stop pressing or urging someone repeatedly about a matter
Please reduce insistence on this topic; we've already discussed it thoroughly.
Por favor, reduza a insistência neste assunto; já o discutimos detalhadamente.