Grandfather is a type of Male. Grandfather is the opposite of Grandchild. Grandchild is the opposite of Grandparent. Grandmother is a type of Grandparent. 
Fluid is related to Eye. Eye is related to Skull. Skull is related to Neck. Neck is related to Box. 
Male <--IsA-- Grandfather <--Antonym--> Grandchild <--Antonym--> Grandparent <--IsA-- Grandmother 
Fluid <--RelatedTo--> Eye <--RelatedTo--> Skull <--RelatedTo--> Neck <--RelatedTo--> Box 