IPA: /əˌblɪtəˈreɪʃən/
KK: /əˌblitəˈreɪʃən/
The act of completely destroying or removing something so that it no longer exists.
The obliteration of the old building made way for a new park.
Obliteration is formed from "ob-" (meaning against or over) and "literare" (meaning to write). The word describes the act of writing over something to the point that it is no longer visible or recognizable, effectively erasing it.
Think of 'writing over' ('literare') something 'against' or 'over' ('ob-') until it disappears — that's what obliteration means.