Sentence:  The foregoing , aided by several clues I 'll withhold to keep you on your toes , will pursue you with a tenacity worthy of Inspector Javert , but before they close in , gird yourselves , I repeat , for a vengeance infinitely <WSD>more</WSD> pitiless . 
Meaning of the word marked with <WSD> tags:  (comparative of `much' used with mass nouns) a quantifier meaning greater in size or amount or extent or degree