Sentence:  But the fashion spreads deeper and wider; the village is infected and the village green; Amelias and Claras sweep your rooms and cook your dinners, gentle Sophias milk your cows, and if you ask a pretty smiling girl at a cottage door to tell you her name, the rosy lips <WSD>lisp</WSD> out Caroline. 
Meaning of the word marked with <WSD> tags:  To speak with reserve or concealment; to utter timidly or confidentially.