thwarter

Từ điển WordNet v3.1 - WordNet Dictionary

noun

someone who systematically obstructs some action that others want to take
• Syn:
obstructionist, obstructor, obstructer, resister
• Derivationally related forms:
thwart, resist (for: resister), obstruct (for: obstructer), obstruct (for: obstructor), obstructionism (for: obstructionist)
• Hypernyms:
disputant, controversialist, eristic
• Hyponyms:
naysayer, stonewaller