Lion is a type of Person. Lion is related to Big. Big is related to Ocean. Ocean is related to Swim. 
Ambitious is etymologically related to Ambition. Ambition is a type of Desire. Desire is a type of Tendency. Tendency is derived from Tend. 
Person <--IsA-- Lion <--RelatedTo--> Big <--RelatedTo--> Ocean <--RelatedTo--> Swim 
Ambitious --EtymologicallyRelatedTo--> Ambition --IsA--> Desire --IsA--> Tendency --DerivedFrom--> Tend 