Sentence:  That concertina was a wonder in its way. The handles that was on it first was wore out long ago, and he'd made new ones of braided rope yarn. And the <WSD>bellows</WSD> was patched in more places than a cranberry picker's overalls. 
Meaning of the word marked with <WSD> tags:  A device for delivering pressurized air in a controlled quantity to a controlled location. At its most simple terms a bellows is a container which is deformable in such a way as to alter its volume which has an outlet or outlets where one wishes to blow air.