rapidity

[ ruh-pid-i-tee ]
/ rəˈpɪd ɪ ti /

noun

a rapid state or quality; quickness; celerity.
Also rap·id·ness [rap-id-nis] /ˈræp ɪd nɪs/.

Origin of rapidity

From the Latin word rapiditās, dating back to 1610–20. See rapid, -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for rapidity