oblivion
//əˈblɪv.i.ən//
Noun
1
The state of being completely forgotten or unknown.
The once-famous singer faded into oblivion after retiring from the music industry.
2
The state of being unaware or unconscious of what is happening around one.
He drank himself into oblivion, unaware of the chaos around him.
3
Complete destruction or extinction.
The ancient civilization was bombed into oblivion during the war.