negator

It seems like an adverb, but in many contexts it is actually a negator: “He is hardly a brilliant negotiator” means he is not a brilliant negotiator.

When several dishes no cardiologist would green-light were followed by a fantasy garden of vegetables, one of my dining companions cried, “The guilt negator!”

Abnegā′tion, renunciation; Ab′negator, one who abnegates or renounces.

Of life and form and growth He is negator; and his ceaseless joy Is to impede and drag to chaos back The shoot that toward the light triumphant springs.