Redundant, Surplus, Residue, Balance
noun, の adjective
If you have a surplus surplus it's a little redundant and you end up having a surplus of surpluses!
よじょう
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
余剰資金で株を買いました。
I bought stock with surplus funds.