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prevail upon

C1 formal inseparable transitive
In simple words

To convince someone to do something, even though they didn't really want to do it at first.

Meanings

1 C1 idiomatic formal

To successfully persuade someone — often through persistence or moral argument — to do something they were unwilling to do.

"She finally prevailed upon her elderly father to see a doctor."

"I prevailed upon the reluctant Mr. Huxley to accompany me."

— Arthur Conan Doyle, The Adventures of Sherlock Holmes (1892) — paraphrase of narrative style
Grammar: inseparable
Usage notes

Distinctly formal and somewhat literary. Implies that persuasion required effort and that the person was initially unwilling. Always takes a human object followed by an infinitive: 'prevail upon someone to do something'. Common in formal correspondence, literary writing, and formal speech. Using it in casual conversation would sound stiff or old-fashioned.

Commonly used with

friend colleague minister reluctant persuade convince expert

Forms

Base
prevail upon
I/you/we/they
3rd person
prevails upon
he/she/it
Past simple
prevailed upon
yesterday
Past participle
prevailed upon
have + pp
-ing form
prevailing upon
continuous

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Synonyms

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