Sentence:  and now the bed shook, the curtains rattled so, that I could scarce hear the sighs and murmurs, the <WSD>heaves</WSD> and pantings that accompanied the action, from the beginning to the end 
Meaning of the word marked with <WSD> tags:  An upward motion; a rising; a swell or distention, as of the breast in difficult breathing, of the waves, of the earth in an earthquake, etc.