Other forms: supplicants; supplicantly
If you pray every night to be accepted to your dream college, you can call yourself a supplicant, or a person who asks humbly for something.
A supplicant can be a fervently religious person who prays to God for help with a problem, and it can also be someone who begs earnestly for something he or she wants. A younger brother entreating his sister to be allowed in her tree house could be described as a supplicant. The Latin root word is supplicantem, "plead humbly."