v. 1) настаивать (на чем-л.); настойчиво утверждать (on, upon) Throughout the trial, the prisoner ed on his lack of guilt. 2) настойчиво требовать (on) I'm afraid I have to on the return of my book at once.
To Insist — (also: to hold, to infuse) - настаивать
Англо-русский словарь