mercuriousness means the quality of being mercurious (like Mercury in celerity). Lexicurio rates it Rare gem — a strength score of 82 out of 100.
Etymology
From mercurious + -ness.
noun
- The quality of being mercurious (like Mercury in celerity).“In memory of which service he had given him, for the crest of his arms, a chapeau with wings, to denote the Mercuriousness of this messenger.”