"nudo descompuesto" in English

knot- rotten

knot- attachment- hitch- knob- nub- climax- crux- heart- joint- nodehub- junction- node

decomposed- altered- changed- rotten- broken- broken-down- bung

to break down- to decay- to decompose- to break down- to break- to mess up- to break up- to distort- to get on sb's nerves- to rot- to split- to break … down into factors- to factorize- to separate … into compounds- to split up- to cause … to decompose- to cause … to rot- to give … diarrhea- to give … diarrhoea