premeditator

/priˈmɛdɪˌteɪtər/
noun
  1. A person who plans or thinks about something carefully in advance, often with harmful intent.
    • A premeditator usually leaves fewer clues than someone who acts on impulse.
    • In the story, the villain was a cold premeditator who had planned every detail.
    • The detective suspected the man was a premeditator of the crime.
Antonyms
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