Trend is related to Direction. Connection is etymologically related to Direction. Connection is related to Line. 
Sweater is derived from Sweat. Sweat is a synonym of Worry. Worry is related to Concern. Concern is a synonym of Interest. 
Trend <--RelatedTo--> Direction <--EtymologicallyRelatedTo-- Connection <--RelatedTo--> Line 
Sweater --DerivedFrom--> Sweat <--Synonym--> Worry <--RelatedTo--> Concern <--Synonym--> Interest 