grievous Synonyms

weighty dangerous heartbreaking heavy atrocious heartrending grave monstrous severe life-threatening serious sad ruinous rueful ponderous pitiful saddening pitiable peracute mournful nasty onerous oppressive backbreaking pailful painful parlous shocking sobering sore wailful heart-rending woeful wounding wretched yearnful grueling heavyweight nociceptive upsetting unfortunate traumatic sorrowful stressful superincumbent taxing terrible tormenting tough tragic