Element is related to Silver. Silver is related to Second. 
Could is etymologically related to Will. Will is related to Slope. Slope is related to Decent. Decent is a synonym of Nice. 
Element <--RelatedTo--> Silver <--RelatedTo--> Second 
Could --EtymologicallyRelatedTo--> Will <--RelatedTo--> Slope <--RelatedTo--> Decent <--Synonym--> Nice 