How can you change lazy onto adverb?

lazily

By removing the s.

Lazily

Lazy is an adjective. Lazily, however, is an adverb. The former describes a noun and the latter describes a verb.

Here is an example:He is a noted researcher and scholar. (Here, scholar is a noun.)He's a scholarly researcher. (Here, scholarly is an adverb. One way to make an adverb is to add -ly.)