To surbase something means to put something under the base of something else, like a building or a statue.
Surbasing something is usually a good thing because it makes things stronger and more stable.
Examples:
The builders will surbase the statue to make it stronger.
We need to surbase the house to keep it from falling over.
She surbased the table to make it stronger.
I surbased my sandwich with extra cheese to make it tastier.
He surbased the tree with extra dirt to keep it from falling over.
The workers surbased the bridge to make it safe for cars.