Tachy- Definition
taki
prefix
Rapid; accelerated.
Tachymeter.
American Heritage
affix
Rapid, swift, fast.
Tachymeter.
Webster's New World
Origin of Tachy-
Gr < tachys, swift < IE *dhengh-, to reach, strong, fast > Sans daghnōti, (he) reaches
From Webster's New World College Dictionary, 5th Edition
Greek takhu- from takhus swift
From American Heritage Dictionary of the English Language, 5th Edition
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