Sentence:  There's no end to their <WSD>daftness</WSD> if they once start on that track. A lawfu' trade's a lawfu' trade, says I, and it's contrary to public policy to pit it at the mercy of wheen cranks. D'ye no agree, sir? By the way, I havena got your name? 
Meaning of the word marked with <WSD> tags:  Property of being daft.