noun, noun or participle which takes 'suru', transitive verb
A formal, earnest request or plea, often made to an authority or in an official context. Can be used as a noun or with する as a transitive verb.
住民たちは市に道路の拡張を嘆願した。
The residents petitioned the city for the road expansion.
彼の嘆願にもかかわらず、会社は方針を変えなかった。
Despite his entreaty, the company did not change its policy.