Resistance is the opposite of Current. Current is related to Movement. Movement is related to Drop. 
Emotion is a synonym of Affect. Affect is a synonym of Concern. Concerned is a form of Concern. Concerned is similar to Afraid. 
Resistance <--Antonym--> Current <--RelatedTo--> Movement <--RelatedTo--> Drop 
Emotion <--Synonym--> Affect <--Synonym--> Concern <--FormOf-- Concerned <--SimilarTo--> Afraid 