Interfere is a synonym of Cross. Cross is related to Emotion. Emotion is related to Sad. Sad is related to Regret. 
Instrument is related to Gun. Gun is related to Aim. Aim is a synonym of Drive. 
Interfere <--Synonym--> Cross <--RelatedTo--> Emotion <--RelatedTo--> Sad <--RelatedTo--> Regret 
Instrument <--RelatedTo--> Gun <--RelatedTo--> Aim <--Synonym--> Drive 