(a.) Alt. of Polysyllabical.

Herculean abstruse arduous brutal complex critical delicate demanding difficile difficult exacting formidable hairy hard hard-earned hard-fought 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