Sentence:  She reached it soon after half-past two. She found its gloomy nineteenth-century façade, black with the smuts of ninety years, a little <WSD>daunting</WSD>, and mounted its broad steps in some trepidation. But she rang the bell hard and knocked firmly. 
Meaning of the word marked with <WSD> tags:  Intimidatingly impressive; awe-inspiring, overwhelming.