The word "likewise" is an adverb that means "in the same way" or "similarly." It is often used to indicate that what applies to one thing or person also applies to another. For example, if you say "I enjoy reading; likewise, my sister loves to read," you are expressing that your sister has a similar enjoyment for reading as you do.
The word "likewise" comes from the Middle English "likewis," which is a combination of "like" and "wise." The term "like" originates from Old English "gelic," meaning "similar" or "having the same form," while "wise" originates from Old English "wīs," meaning "manner" or "way."