Suppliant is an adjective that means ‘making or expressing a plea to someone in power.’ it is also a noun that refers to a person making a humble plea to someone in power. 

Our word of the day comes from the Latin word supplicare (soop lee CAR ay) which means to ‘plea’ or ‘beg.’ Suppliant may refer to a person inclined to be to someone in power or it may describe the person doing the begging. Here’s an example of the latter:

Tommy’s suppliant conversations with his boss got pretty embarrassing after a while. You can only watch a man beg so much before you truly pity him.