Articulate is a type of Connect. Connect is related to Leg. 
Ambitious is etymologically related to Ambition. Ambition is a type of Desire. Desire is related to Extreme. Extreme is the opposite of Close. 
Articulate --IsA--> Connect <--RelatedTo--> Leg 
Ambitious --EtymologicallyRelatedTo--> Ambition --IsA--> Desire <--RelatedTo--> Extreme <--Antonym--> Close 