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English definition of “prevail on/upon sb”

prevail on/upon sb

phrasal verb with prevail     /prɪˈveɪl/ verb [I] formal
to persuade someone to do something that they do not want to do: He was eventually prevailed upon to accept the appointment.Urging and persuadingCausing somebody to act
(Definition of prevail on/upon sb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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