pernicity

== English == === Etymology === From pernic(ious) +‎ -ity, from Latin pernicitas. See pernicious. === Noun === pernicity (uncountable) (obsolete) swiftness; celerity === References === “pernicity”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.