Sentence:  There was an air of gravity and importance about the garb of the person, and something indescribably odd, I might say <WSD>awful</WSD>, in the perfect, stonelike stillness of the figure, that effectually checked the testy comment which had at once risen to the lips of the irritated artist. 
Meaning of the word marked with <WSD> tags:  Causing fear or horror; appalling, terrible.