A-lăc'ri-ty, n.

noun

n. [Lat. alacritas, from alacer, or alacris, lively, eager.] A cheerful readiness, willingness, or promptitude; cheerfulness; gayety; sprightliness; as, the soldiers advanced with alacrity to meet the enemy. “Alacrity to undertake the commission.” Macaulay.

Synonyms—Cheerfulness; gayety; sprightliness.