Synonym of severe

intensify heat up tone up set off intensate heating up pour it on setting off pour on add fuel

harsh stern strict cruel brutal ruthless relentless rigorous difficult uncompromising serious astringent austere biting caustic close cold cutting disapproving dour earnest firm flinty forbidding grave grim hard hard-nosed inconsiderate inexorable inflexible iron-handed obdurate oppressive peremptory pitiless resolute resolved rigid satirical scathing sober stiff strait-laced tight-lipped unalterable unbending unchanging unfeeling unrelenting unsmiling unsparing acute bitter dangerous drastic extreme fierce heavy intense punishing sharp stringent tough violent arduous ascetic bleak consequential critical dear demanding despotic distressing domineering effortful exacting grinding hefty implacable inclement intemperate mordant overbearing rugged sore strenuous taxing toilsome tyrannical unpleasant weighty wicked

awful terrible

plain simple Spartan unadorned unembellished undecorated stark