Meaning : To certain extent or degree.
							Example : 
							Pretty big.
							Pretty bad.
							Jolly decent of him.
							The shoes are priced reasonably.
							He is fairly clever with computers.
							
Synonyms : jolly, middling, moderately, passably, pretty, reasonably, somewhat
To a degree that exceeds the bounds or reason or moderation.
His prices are unreasonably high.Meaning : Without favoring one party, in a fair evenhanded manner.
							Example : 
							Deal fairly with one another.
							
Synonyms : evenhandedly, fair
Meaning : In conformity with the rules or laws and without fraud or cheating.
							Example : 
							They played fairly.
							
In an unfair manner.
They dealt with him unfairly.