n. [ L. acritas, fr. acer sharp: cf. F. âcreté. ] Sharpness; keenness. [ Obs. ] [ 1913 Webster ]
n. [ L. alacritas, fr. alacer lively, eager, prob. akin to Gr. &unr_; to drive, Goth. aljan zeal. ] A cheerful readiness, willingness, or promptitude; joyous activity; briskness; sprightliness;
I have not that alacrity of spirit,
Nor cheer of mind that I was wont to have. Shak. [ 1913 Webster ]