ingratiatory

1. calculated to please or gain favor

    e.g. a smooth ingratiating manner

    Synonym: ingratiating insinuating

2. ingratiatory

2. pleasingly persuasive or intended to persuade

    e.g. a coaxing and obsequious voice
           her manner is quiet and ingratiatory and a little too agreeable

    Synonym: coaxing