Herculean, Spartan, Spartanic, abstruse, accurate, arduous, arousing, astringent, attentive, austere, authoritarian, brutal, burdensome, censorious, choicy, choosy, clamant, clamorous, close, complex, conscientious, correct, critical, crying, cutthroat, delicate, demanding, detailed, difficile, difficult, discriminating, discriminative, dour, draining, educible, eductive, elicitory, eradicative, evocative, exact, exactive, excessive, exigent, exorbitant, exquisite, extortionary, extortionate, extortive, extractive, extravagant, fancy, fastidious, fine, finical, finicking, finicky, formidable, fussy, gouging, grasping, grievous, grim, grossly overpriced, hairy, hard, hard-earned, hard-fought, harsh, hypercritical, immoderate, imperative, importunate, inflationary, inordinate, insistent, instant, intricate, jawbreaking, knotted, knotty, laborious, loud, mean, meticulous, minute, narrow, nice, no picnic, not easy, operose, oppressive, out of bounds, out of sight, outrageous, overpriced, particular, perfectionistic, persistent, pertinacious, picky, precise, precisianistic, precisionistic, preposterous, pressing, priggish, prohibitive, prudish, punctilious, punctual, puristic, puritanic, refined, religious, rigid, rigorous, rough, rugged, scrupulous, scrutinizing, selective, sensitive, set with thorns, severe, skyrocketing, spiny, spiraling, steep, stern, strenuous, strict, stringent, subtle, taxing, thorny, ticklish, toilsome, tough, tricky, trying, tyrannical, unconscionable, undue, unreasonable, unsparing, unwarranted, uphill, uprooting, urgent, usurious, weighty, wicked