Sentence:  The foregoing , aided by several clues I 'll withhold to keep you on your toes , will pursue you with a tenacity <WSD>worthy</WSD> of Inspector Javert , but before they close in , gird yourselves , I repeat , for a vengeance infinitely more pitiless . 
Meaning of the word marked with <WSD> tags:  having worth or merit or value; being honorable or admirable