Hurt is related to Blood. Blood is related to Part. Part is related to Pocket. 
Concerned is a synonym of Careful. Careful is similar to Troubled. Troubled is a synonym of Anxious. Anxious is the opposite of Calm. 
Hurt <--RelatedTo--> Blood <--RelatedTo--> Part <--RelatedTo--> Pocket 
Concerned <--Synonym--> Careful <--SimilarTo--> Troubled <--Synonym--> Anxious <--Antonym--> Calm 