Obliterate

DEF: Completely destroyed

EX:

The atom bomb obliterated part of Hiroshima

Merriam-Webster Online Dictionary
obliterate (verb)
transitive verb
1.
a) to remove utterly from recognition or memory
b) to remove from existence destroy utterly all trace, indication, or significance of
c) to cause to disappear (as a bodily part or a scar) or collapse (as a duct conveying body fluid) - remove a blood vessel obliterated by inflammation
2.
to make undecipherable or imperceptible by obscuring or wearing away
3.
- cancel