Function is related to Purpose. Purpose is related to Meeting. Meeting is related to Mass. Mess is etymologically related to Mass. 
Green is etymologically related to Grow. Keep is a type of Grow. Keep is related to Habit. Habit is related to Nose. 
Function <--RelatedTo--> Purpose <--RelatedTo--> Meeting <--RelatedTo--> Mass <--EtymologicallyRelatedTo-- Mess 
Green --EtymologicallyRelatedTo--> Grow <--IsA-- Keep <--RelatedTo--> Habit <--RelatedTo--> Nose 