Sentence:  Thus the red damask curtains which now shut out the <WSD>fog</WSD>-laden, drizzling atmosphere of the Marylebone Road, had cost a mere song, and yet they might have been warranted to last another thirty years. A great bargain also had been the excellent Axminster carpet which covered the floor;nb.... 
Meaning of the word marked with <WSD> tags:  A thick cloud that forms near the ground; the obscurity of such a cloud.