37 synonyms for demanding such as importunate, herculean, clamorous, and hard to please. Demanding is an adjective, and its antonyms are easy and effortless.
Herculean, a tall order, arduous, back-breaking, burdensome, challenging, difficult, draining, exacting, exhausting, formidable, gruelling, hard, knackering, onerous, punishing, rigorous, stressful, taxing, testing, tiring, toilsome, tough, uphill, wearing, wearisome, and wearying.
Clamorous, exigent, hard to please, importunate, insistent, nagging, possessive, tiresome, and trying.