Demanding
Taxing
Synonyms Difficult, testing, exacting, hard, burdensome, formidable, tiring, exhausting, wearisome, uphill, gruelling, Herculean, a tall order, toilsome, challenging, taxing, tough, onerous, stressful, arduous, wearing, wearying, draining, rigorous, back-breaking, punishing, and knackering.
Importunate
Synonyms Nagging, importunate, possessive, tiresome, exigent, clamorous, insistent, trying, and hard to please.
Example Sentences
The job is very demanding physically.
She has a demanding schedule today.
His boss is extremely demanding and critical.
Training for the marathon is demanding.