burdensome Synonyms

onerous taxing cumbersome troublesome exacting weighty oppressive demanding heavy arduous grievous problematic thorny tiring toilful toilsome tough tricky punishing superincumbent stressful strenuous severe rugged sore steep stodgy rough punitive serious troublous backbreaking grueling gruelling heavyweight labor-intensive laboured burdensomeness unbearable back-breaking cumbersomeness wrenching worrisome trying brain surgery unwieldy uphill upstream vexatious wearing