unilateralist
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/ˌjuːnɪˈlætrəlɪst/
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/ˌjuːnɪˈlætrəlɪst/
A person who supports taking action alone, especially in matters like disarmament without waiting for others.
The unilateralist approach to nuclear disarmament was criticized by many.
Supporting or involving action taken alone, especially in matters like disarmament without waiting for others.
The country's unilateralist policy on nuclear disarmament was met with skepticism.