archaicism

/ɑrˈkeɪɪsɪzəm/
noun
  1. An old-fashioned word, phrase, or style that is no longer in common use.
    • In his speech, he dropped an archaicism that confused the younger audience.
    • The dictionary marks archaisms and archaicism with a special label.
    • The poet used an archaicism like 'ere' to give the poem a medieval feel.
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What does "archaicism" mean? | whatsthatwordmean | whatsthatwordmean