tachy-

UK/ˌtæk.ɪ/Canada, US/ˌtæk.ə/New Zealand/ˌtɛk.ə/

prefix

fast

Opposite
brady-
OriginAncient Greek τᾰχῠ́ς (tăkhŭ́s) ← Proto-Indo-European *dʰn̥gʰ-ú-sder.? →
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Meanings

prefix

alternative tacho-

  1. fast

    Antonyms: brady-

Synonyms & antonyms

prefixfast

Opposite
brady-

Origin

  1. Proto-Indo-European*dʰengʰ-
  2. Proto-Indo-European*dʰn̥gʰ-ú-sder.?
  3. Ancient Greekτᾰχῠ́ς (tăkhŭ́s)
  4. Englishtachy-

Borrowed from Ancient Greek τᾰχῠ́ς (tăkhŭ́s, “swift”).

More words from Ancient Greek

Full word history & related roots →
Cite this entry
APA

tachy-. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/tachy-

MLA

“tachy-.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/tachy-. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “tachy-,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/tachy-.

Source: tachy- on Wiktionary, CC BY-SA 4.0.