She explained the rules simply.

In a straightforward or uncomplicated manner.
He answered the question simply.
The task was completed simply.
They lived simply and happily.
simply stated
simply put
simply explained
easily
clearly
plainly
She explained the rules simply.

In a straightforward or uncomplicated manner.
He answered the question simply.
The instructions were written simply.
They solved the problem simply.
simply put
simply stated
simply explained
easily
clearly
plainly
She simply smiled at me.

In a straightforward or uncomplicated way.
He simply explained the rules.
They simply wanted to help.
I simply can't believe it.
simply put
simply stated
simply amazing
clearly
easily
plainly