Sentence:  Of course, bad habits die hard, and even with the new policy there were <WSD>recrudescences</WSD> of the prior practices in the following years. 
Meaning of the word marked with <WSD> tags:  The condition or state being recrudescent; the condition of something (often undesirable) breaking out again, or re-emerging after temporary abatement or suppression. (from mid 17th c.)