English

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Etymology

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underreact +‎ -or

Pronunciation

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Noun

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underreactor (plural underreactors)

  1. One who underreacts.
    • 2005, Katherine M. Ramsland, Inside the Minds of Mass Murderers: Why They Kill:
      The overreactor develops poor focus while the underreactor has trouble developing empathy. Either pattern will affect how others interact with that person, and thus will affect the neurochemical profile.