Mother is related to Relative. Relative is related to Size. Size is related to Determination. 
Island can be used for Relax. you would Relax because Peace. Peace is the opposite of Fighting. 
Mother <--RelatedTo--> Relative <--RelatedTo--> Size <--RelatedTo--> Determination 
Island --UsedFor--> Relax --MotivatedByGoal--> Peace <--Antonym--> Fighting 