Failure is a synonym of Grief. Dying can cause/lead to Grief. Dying is similar to Last. Last is similar to Unlikely. 
Sight is the opposite of Sound. Sound is related to Human. Arab is a type of Human. 
Failure <--Synonym--> Grief <--Causes-- Dying <--SimilarTo--> Last <--SimilarTo--> Unlikely 
Sight <--Antonym--> Sound <--RelatedTo--> Human <--IsA-- Arab 