Sentence:  Mr. Skyros was not a man who thought very much about moral principles ; he found <WSD>money</WSD> 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 smile , and the spaniel like dark eyes , and he felt a little ill . 
Meaning of the word marked with <WSD> tags:  the most common medium of exchange; functions as legal tender