Enthusiasm is related to Ambition. Ambition is related to Drive. one thing you do when you Drive is Slice. Slice is related to Serving. 
Pain is related to Stretch. Stretch is related to Tight. Tight is the opposite of Full. 
Enthusiasm <--RelatedTo--> Ambition <--RelatedTo--> Drive --HasSubevent--> Slice <--RelatedTo--> Serving 
Pain <--RelatedTo--> Stretch <--RelatedTo--> Tight <--Antonym--> Full 