Sentence:  Perhaps if Felix had first come upon us when this boy was not cavorting so gaily up and down the hall outside the murdered woman 's apartment , we might have had <WSD>less</WSD> trouble convincing Felix of our seriousness . 
Meaning of the word marked with <WSD> tags:  (comparative of `little' usually used with mass nouns) a quantifier meaning not as great in amount or degree