This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. Pertaining to voluntary activity; supporting or promoting voluntarism.

Pertaining to, or characteristic of, the metaphysical or psychological theory of voluntarism.

"And while voluntaristic gestures at the individual level do no harm (and maybe, who knows, some tiny good), I actually believe that it does harm when people claim, in public, that we could solve this problem if we just each “did our part to conserve.”"

voluntarism    voluntarist   

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