Sentence:  Mr. Skyros was not a man who thought very much about moral principles ; he found money much more interesting ; but all the same he thought now , uneasily , of the way in which Angelo earned his living - and paid for his own stuff - and eyed the soft <WSD>smile</WSD> , and the spaniel like dark eyes , and he felt a little ill . 
Meaning of the word marked with <WSD> tags:  a facial expression characterized by turning up the corners of the mouth; usually shows pleasure or amusement