supplication
A very serious, humble plea for help or mercy.
A supplication is a humble, earnest request for help, often made when someone feels powerless or desperate. When you make a supplication, you're pleading with genuine need, often with deep emotion, showing that the matter is serious and urgent.
The word comes from religious contexts, where people make supplications to God during prayer, asking for mercy, healing, or guidance in difficult times. A farmer whose crops are dying in a drought might offer supplications for rain. A parent whose child is seriously ill might make supplications for recovery.
You can also see supplication in everyday situations. A student who has done poorly on a test might approach the teacher in supplication, begging for a second chance. A knight in an old story might make a supplication to the king, kneeling and asking for mercy or assistance.
Supplication involves humility: you're acknowledging that someone else has the power to help you, and you're appealing to their compassion or sense of justice. It's stronger and more serious than a simple request. When you ask your parents if you can stay up late, that's a request. When you desperately plead with them to forgive you after breaking something valuable, that's closer to supplication.