Expect is related to Pregnant. Pregnant is a synonym of Meaningful. Meaningful is derived from Meaning. 
Unfair is the opposite of Fair. Fair is related to Average. Average is a different concept from Outstanding. 
Expect <--RelatedTo--> Pregnant <--Synonym--> Meaningful --DerivedFrom--> Meaning 
Unfair <--Antonym--> Fair <--RelatedTo--> Average <--DistinctFrom--> Outstanding 