Entreaty (noun)

1. A earnest or sincere request or appeal.
2. An earnest and sincere effort to persuade someone to do something.

Origin:

From the old french word entreter, which means to treat, to plead, or to request.

Examples:

1. He made an entreaty to the judge for leniency.
2. The entreaty for peace was ignored.
3. The entreaty to the king was in vain.
4. She made an entreaty to her parents to let her go to the concert.
5. The entreaty to the council was met with resistance.