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|   | Related Terms: |   | abstruse, arduous, brutal, complex, critical, delicate, demanding, difficile, difficult, exacting, formidable, hairy, hard, hard-earned, hard-fought, Herculean, intricate, knotted, knotty, laborious, mean, no picnic, not easy, operose, polysyllabic, rigorous, rough, rugged, sesquipedal, sesquipedalian, set with thorns, severe, spiny, steep, strenuous, thorny, ticklish, toilsome, tough, tricky, uphill, wicked |  
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