thwarter

Definitions of thwarter
  1. noun
    someone who systematically obstructs some action that others want to take
    synonyms: obstructer, obstructionist, obstructor, resister
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    types:
    naysayer
    someone with an aggressively negative attitude
    stonewaller
    one who stonewalls or refuses to answer or cooperate; someone who delays by lengthy speeches etc.
    technophobe
    a person who dislikes or avoids new technology
    type of:
    controversialist, disputant, eristic
    a person who disputes; who is good at or enjoys controversy
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