Insist

глагол (insist on / upon) а) настойчиво утверждать, настаивать на Например: to insist absolutely / definitely / positively — упорно настаивать to insist stubbornly — упрямо настаивать Throughout the trial, the prisoner insisted on his lack of guilt. — В течение всего судебного процесса подсудимый настаивал на своей невиновности. б) настойчиво требовать Например: I'm afraid I have to insist on the return of my book at once. — Пожалуй, я должен потребовать немедленного возвращения моей книги.

Большой англо-русский словарь

Insist

verb Etymology: Middle French or Latin; Middle French insister, from Latin insistere to stand upon, persist, from in- + sistere to take a stand; akin to Latin stare to stand — more at stand intransitive verb 1. to be emphatic, firm, or resolute about something intended, demanded, or required Example: they insist on going 2. archaic persist transitive verb to maintain in a persistent or positive manner Example: insisted that the story was true

Merriam-Webster's Collegiate Dictionary