Related to unbuild: unbuilt
tr.v. un·built (-bĭlt′), un·build·ing, un·builds
To dismantle, take apart, or demolish; raze.
(Building) to demolish or tear down (a building or other structure)
v. -built, -build•ing. v.t.
1. to demolish (something built); raze.v.i.
2. to raze a building or the like.