oblivious

Meanings

1. 1
   adj

   Lacking awareness; unmindful; unaware, unconscious of.

   Your grandmother is completely oblivious to her surroundings.

2. 2
   adj

   Forgetful.

   He's hopelessly oblivious, always forgetting his appointments.

From Middle English oblivious, from Latin oblīviōsus (“forgetful, oblivious”), formed from oblīvium (“forgetfulness, oblivion”) + -ōsus (“full of, overly, prone to”), from oblīvīscor (“to forget”).

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