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Adverb: perchance  ,pur'chãn(t)s
  1. Expressing uncertainty or possibility; it could be that
    "we may perchance run into them at the concert";
    - possibly, perhaps, maybe, mayhap [archaic], peradventure [archaic]
     
  2. [archaic] Through chance
    "To sleep, perchance to dream …";
    - by chance [archaic]