Suppliant (adjective)

1. Making a humble and earnest request, especially as part of a petition or plea.
2. Imploring or begging for something.

Origin:

From latin supplicantem, present participle of supplicare (to implore), from sub- + placare (to please).

Examples:

1. She stood before the judge with a suppliant expression on her face, begging for leniency.
2. In a suppliant voice, he asked for help from his friend.
3. The old man had a suppliant look in his eyes, hoping for a miracle.
4. Her plea was made with a suppliant tone, but the response was harsh and unyielding.
5. The suppliant tone of his voice made it clear that he was asking for a favour.