verb

disengage (something or part of something) and remove it.

he detached the front lamp from its bracket

unfasten,disconnect,disengage,part,separate,uncouple,remove,loose,loosen,untie,unhitch,undo,unhook,unbutton,unzip,unclick,free,sever,pull off,cut off,clip off,hack off,chop off,prune off,nip off,tear off,break off,strip off,disunite,disjoin