dis ‧ man ‧ tle /dɪsˈmæntl/ BrE AmE verb [transitive]
[ Date: 1500-1600 ; Language: Old French ; Origin: desmanteler , from mantel 'cloak' ]
1 . to take a machine or piece of equipment apart so that it is in separate pieces:
Chris dismantled the bike in five minutes.
2 . to gradually get rid of a system or organization:
an election promise to dismantle the existing tax legislation