persuasive -
intended or having the power to induce action or belief; "persuasive eloquence"; "a most persuasive speaker"; "a persuasive argument"
dissuasive deterring from action; "dissuasive advice"; "made a slight dissuasive gesture with her hand"
convincing causing one to believe the truth of something; "a convincing story"; "a convincing manner"
coaxing,
ingratiatory pleasingly persuasive or intended to persuade; "a coaxing and obsequious voice"; "her manner is quiet and ingratiatory and a little too agreeable"
cogent,
telling,
weighty powerfully persuasive; "a cogent argument"; "a telling presentation"; "a weighty argument"
compelling tending to persuade by forcefulness of argument; "new and compelling evidence"