"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).
tacet
tacho-
tachometer
tachy-
tachycardia
tachygraphy
tachymeter
tachyon
tachypnea
tacit
taciturn