His voice was hoarse and his unkempt head only added to its grewsome quality.
1909, Cleveland Moffett, chapter 19, in Through the Wall:
And various grewsome objects, a card case of human skin, and the twisted scarf used by a strangler.
1918, Randall Parrish, Wolves of the Sea:
I sprang back, giving utterance to a cry, which brought Watkins to me, and the two of us stared at the grewsome object and then about into the wavering shadows.