The word "NOT" in the clues below can be replaced by certain prefixes which will make sense before the same five-letter word. What is the missing word, what are the prefixes, and what are the other two words?
                   _ _ _ _ _
          NOT _ _ _ _ _
NOT NOT _ _ _ _ _

Answers:

           DATED
     UNDATED
INUNDATED 

Credit:
The Enigma
March, 2016
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