Excess
Excessive, Over
noun, な adjective
If you surpass your surplus then you have lots of excess stuff.
過剰 is a relatively formal word that refers to something being excessive. It can also often mean over — like overconsumption, overreaction, or overproduction — in various contexts related to behaviors, emotions, or physical quantities.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
過剰包装は紙の無駄です。
Over-wrapping is a waste of paper.