Oblivious
/əˈblɪviəs/
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Definition
(adj) Lacking awareness; unmindful; unaware, unconscious of.
Sentence Examples
She was so preoccupied that she was oblivious of her surroundings.
My father is oblivious to the emotional pain his abuse caused me.
CEFR Practice Quiz
She was so absorbed in her book that she was completely ____ to the people around her.