Trip can cause/lead to Stumble. Trip can cause/lead to Happen. Happen is related to Circumstance. 
Ego is related to Image. Image is a synonym of Shape. Shape is related to Exercise. Exercise is related to Breathing. 
Stumble <--Causes-- Trip --Causes--> Happen <--RelatedTo--> Circumstance 
Ego <--RelatedTo--> Image <--Synonym--> Shape <--RelatedTo--> Exercise <--RelatedTo--> Breathing 