word-forming element meaning "rapid, swift, fast," from Latinized combining form of Greek takhys "swift, rapid, hasty," related to takhos "speed, swiftness," of uncertain origin.
Entries linking to tachy-
tachycardia n.
"rapid heartbeat," 1868, Modern Latin, coined 1867 by German-born physician Hermann Lebert (1813-1878) from tachy- "swift" + Latinized form of Greek kardia "heart," from PIE root *kerd- "heart."
tachygraphy n.
"shorthand, stenography," 1640s, from Latinized form of Greek takhygraphia, from takhys "swift" (see tachy-) + -graphia (see -graphy). Related: Tachygraphic; tachygrapher "stenographer" (especially among the ancients; see Tironian).