Sentence:  A scant half mile away Shelley and Mary were doubtless sitting on their diminutive terrace , the air about them scented with <WSD>stock</WSD> , and listening to the nightingale who had nested in the big lime tree at the foot of the garden . 
Meaning of the word marked with <WSD> tags:  liquid in which meat and vegetables are simmered; used as a basis for e.g. soups or sauces