Excuse is a synonym of Forgive. Forgive is derived from Give. Give is related to Describe. Describe is related to Function. 
Painting is related to Canvas. Canvas is part of Ring. 
Excuse <--Synonym--> Forgive --DerivedFrom--> Give <--RelatedTo--> Describe <--RelatedTo--> Function 
Painting <--RelatedTo--> Canvas --PartOf--> Ring 