~ is added to adjectives to form adverbs that indicate the manner or nature of something.
I saw Louise walking slowly to the bus stop...
They were badly injured...
Sarah has typically British fair skin.
~ 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...
This was a cowardly thing to do.
~ 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.
...the language that we use daily.