-ly (-lier comparative) (-liest superlative )
1 suffix -ly is added to adjectives to form adverbs that indicate the manner or nature of something.
I saw Louise walking slowly to the bus stop...
2 suffix -ly is added to nouns to form adjectives that describe someone or something as being like or typical of a particular kind of person or thing.
The staff are very friendly...
3 suffix -ly is added to nouns referring to periods of time to form adjectives or adverbs that say how often something happens or is done.
...a weekly newspaper.