Sink is a synonym of Drop. Drop is related to Egg. 
Ankle is related to Heel. Heel is a type of Hit. Arrow can be used for Hit. Arrow is related to Hunting. 
Sink <--Synonym--> Drop <--RelatedTo--> Egg 
Ankle <--RelatedTo--> Heel --IsA--> Hit <--UsedFor-- Arrow <--RelatedTo--> Hunting 