Insight is etymologically related to Sight. Insight is related to Deep. Deep is related to Mine. Mine is a type of Reinforce. 
Educator is a type of Worker. Missionary is a type of Worker. Missionary is a type of Teacher. Professor is a type of Teacher. 
Sight <--EtymologicallyRelatedTo-- Insight <--RelatedTo--> Deep <--RelatedTo--> Mine --IsA--> Reinforce 
Educator --IsA--> Worker <--IsA-- Missionary --IsA--> Teacher <--IsA-- Professor 