Idea is related to Abstract. Abstract is related to Design. Design is related to Drawing. Pen can be used for Drawing. 
Ethical is related to Moral. Moral is related to Good. Good is related to Soil. 
Idea <--RelatedTo--> Abstract <--RelatedTo--> Design <--RelatedTo--> Drawing <--UsedFor-- Pen 
Ethical <--RelatedTo--> Moral <--RelatedTo--> Good <--RelatedTo--> Soil 