Meat can be used for Eat. Meat is related to Department. 
Weight is related to Quantity. Quantity is related to Age. Age is the opposite of Youth. Youth is a synonym of Youngster. 
Eat <--UsedFor-- Meat <--RelatedTo--> Department 
Weight <--RelatedTo--> Quantity <--RelatedTo--> Age <--Antonym--> Youth <--Synonym--> Youngster 