Sentence:  The stately "Votaress", with her towering funnels lost in the upper night, was running well inshore under a point, wrapped in a world-wide silence broken only by the placid <WSD>outgo</WSD> of her own vast breath, the soft rush of her torrential footsteps far below, and the answering rustle of the nearer shore. 
Meaning of the word marked with <WSD> tags:  The act or process of going out.