Action is related to Melt. Melt is a type of Weaken. Weaken is the opposite of Strengthen. 
Scenario is a type of Setting. Scenario is etymologically related to Scene. Scene is a type of Drama. 
Action <--RelatedTo--> Melt --IsA--> Weaken <--Antonym--> Strengthen 
Setting <--IsA-- Scenario --EtymologicallyRelatedTo--> Scene --IsA--> Drama 