To do something in a way that is not deep, especially when talking about water or thinking.
Shallowly can make people think of not thinking very hard or of not being very serious.
Examples:
She swam shallowly in the pool.
He thought about the problem shallowly.
The water was shallowly over his feet.
He dug the hole shallowly and it fell in.
She only cared shallowly about the game.
He read the book shallowly and didn't understand it.