millstone

difficult, not easy, hard, tough; troublesome, toilsome, irksome; operose, laborious, onerous, arduous, Herculean, formidable; sooner said than done; more easily said than done., difficult to deal with, hard to deal with; ill-conditioned, crabbed; not to be handled with kid gloves, not made with rose water., awkward, unwieldy, unmanageable; intractable, stubborn (obstinate); perverse, refractory, plaguy, trying, thorny, rugged; knotted, knotty; invious; pathless, trackless; labyrinthine (convoluted); intricate, complicated (tangled); impracticable (impossible); not feasible; desperate (hopeless)., embarrassing, perplexing (uncertain); delicate, ticklish, critical; beset with difficulties, full of difficulties, surrounded by difficulties, entangled by difficulties, encompassed with difficulties.