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arduous

laboratus

arduous adjective

  /ˈɑɹ.d͡ʒu.əs/ , /ˈɑː.djuː.əs/ , /ˈɑː.d͡ʒuː.əs/
  • Needing or using up much energy; testing powers of endurance.
  • Difficult or exhausting to traverse.
 arduus
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