Skilled is etymologically related to Skill. Skill is related to Measure. Measure is related to Half. 
Uncle is related to Man. Man is related to Wise. Wise is the opposite of Fool. 
Skilled --EtymologicallyRelatedTo--> Skill <--RelatedTo--> Measure <--RelatedTo--> Half 
Uncle <--RelatedTo--> Man <--RelatedTo--> Wise <--Antonym--> Fool 