Sentence:  She wakened in sharp panic, bewildered by the grotesquerie of some half-remembered dream in contrast with the harshness of inclement fact, drowsily realising that since she had fallen asleep it had come on to rain smartly out of a <WSD>shrouded</WSD> sky. 
Meaning of the word marked with <WSD> tags:  Concealed or hidden from sight, as if by a shroud.