- Adding "ly" to the end of an noun turns the word into an adjective. The adjectives now have the meaning of "like (the noun), or something that is characteristic of (the noun)".
- If you say "He has manly facial features" you are saying that his facial features are like the facial features that are normal for a man.
- Adding "ly" to the end of an adjective turns the word into an adverb. The meaning of the word does not change, or comes from the same idea.
- You can say, "Those are his usual clothes" or "That is how he usually dresses".
- In a few words the meaning may change. These word are often verbs.
- "Likely" does not mean the same thing as "like" at all.