There are some adverbs that have negative meaning. They are called negative adverbs.

We will not stay long.

They never speak to each other.

The above sentences express something that cannot or will not be done through the words not and never. These are negative adverbs.

There are other adverbs that create a negative meaning without the use of no, not, neither, never, or nor.

These are hardly, seldom, rarely, scarcely, nowhere, and ever.

They seldom go out.

This means - they go out very less.

He rarely watches TV.

This means - he watches TV only once in a while.