phr verb
Break down is used with these nouns as the subject: ↑ acid , ↑ car , ↑ communication , ↑ consensus , ↑ engine , ↑ heating , ↑ machine , ↑ marriage , ↑ negotiation , ↑ relationship , ↑ system , ↑ talk , ↑ vehicle
Break down is used with these nouns as the object: ↑ barrier , ↑ door , ↑ fat , ↑ prejudice , ↑ resistance