Synonyms to terminally

severely, acutely, ascetically, austerely, awfully, badly, barely, brutally, coldly, coolly, critically, crudely, cruelly, dangerously, dourly, dreadfully, entirely, fatally, forbiddingly, fully, gloweringly, gravely, grievously, grimly, harshly, inhumanly, mercilessly, modestly, mortally, onerously, painfully, permanently, plainly, primitively, punitively, relentlessly, rigorously, savagely, seriously, simply, soberly, sparely, sparsely, starkly, sternly, strictly, stringently, tyrannically