Supposed is a form of Suppose. Suppose is a synonym of Take. Take is a synonym of Juice. Juice is a type of Current. 
Expression is related to Mode. Modify is etymologically related to Mode. 
Supposed --FormOf--> Suppose <--Synonym--> Take <--Synonym--> Juice --IsA--> Current 
Expression <--RelatedTo--> Mode <--EtymologicallyRelatedTo-- Modify 