Sentence:  Hardly had Mrs. Roebuck driven off when a rusty pick-up truck , father or grandfather of Senor `` Moriarty 's '' Ford sedan , came screeching to a dust swirling stop , and a brown face appeared , its nose threatened by shards of what had once been the side <WSD>window</WSD> . 
Meaning of the word marked with <WSD> tags:  a transparent opening in a vehicle that allow vision out of the sides or back; usually is capable of being opened