Word of the Day: Oblivious

from The New Oxford American Dictionary:
oblivious |əˈblɪviəs| |oʊˈblɪviəs|
adjective
not aware of or not concerned about what is happening around one : she became absorbed, oblivious to the passage of time | the women were oblivious of his presence.
DERIVATIVES
obliviously |əˈblɪviəsli| |oʊˈblɪviəsli| adverb
obliviousness |əˈblɪviəsnəs| |oʊˈblɪviəsnəs| noun
ORIGIN late Middle English : from Latin obliviosus, from oblivio(n-) (see oblivion ).