Suck is etymologically related to Soak. Steep is a type of Soak. 
Capacity is a synonym of Power. Power is related to Bullet. Bullet is related to Piece. Piece is a synonym of Bit. 
Suck --EtymologicallyRelatedTo--> Soak <--IsA-- Steep 
Capacity <--Synonym--> Power <--RelatedTo--> Bullet <--RelatedTo--> Piece <--Synonym--> Bit 