oblivious

 
Pronunciation: /əˈblɪvɪəs/

adjective

  • not aware of or concerned about what is happening around one: she became absorbed, oblivious to the passage of time

Derivatives

obliviously

adverb

obliviousness

noun

Origin:

late Middle English: from Latin obliviosus, from oblivio(n-) (see oblivion)