Extend is related to Edge. Edge is related to Shape. Shape is related to Box. 
Investigation is related to Suspect. Suspect is derived from Suspicion. Suspicious is derived from Suspicion. Suspicious is a synonym of Funny. 
Extend <--RelatedTo--> Edge <--RelatedTo--> Shape <--RelatedTo--> Box 
Investigation <--RelatedTo--> Suspect --DerivedFrom--> Suspicion <--DerivedFrom-- Suspicious <--Synonym--> Funny 