Sentence:  Hardly had Mrs. Roebuck driven off when a rusty <WSD>pick-up</WSD> 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 window . 
Meaning of the word marked with <WSD> tags:  a light truck with an open body and low sides and a tailboard