Webster's English Dictionary

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rotten

rot.ten \'ra:t-*n\ \-*n-(n)*s\ aj [ME roten, fr. ON rotinn; akin to OE 
   rotian to rot] 1: having rotted : PUTRID  2: morally corrupt  3: extremely 
   unpleasant or inferior  4: marked by weakness or unsoundness  - rot.ten.ly 
   av