See more synonyms for unbothered on Thesaurus.com
  1. not experiencing mental or physical discomfort: He was unbothered by the cold.He was unbothered about not being picked for the team.
  2. Slang. indifferent to criticism or negative comments; not annoyed or provoked: She was unbothered by her many haters.They swear they’re unbothered, but they care.

Origin of unbothered

First recorded in 1900–10; un-1 + bother + -ed2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018