ταχύς

Possibly from Proto-Indo-European *dʰn̥gʰ-ú-s, zero-grade u-stem of *dʰengʰ- (“to go quickly”), based on the comparison with Lithuanian déngti (“to run, hurry”) (see there for more potential cognates), though Fraenkel has disputed the connection.^[1][2]

Not related to Sanskrit तकु (taku), तक्व (takva, “quick, fast”), as Ancient Greek χ (kh) does not match Sanskrit क् (k), and the comparative θάσσων (thássōn) proves that the Greek τ (t) in ταχύς (takhús) is originally θ (th), from the aspirated PIE *dʰ (see Grassmann's law).

τᾰχῠ́ς • (takhús) m (feminine τᾰχεῖᾰ, neuter τᾰχῠ́); first/third declension

1. swift, quick, fast, rapid
2. In a short time: soon

• ὠκύς (ōkús)

• βραδύς (bradús, “slow”)

• θᾱ́σσων (thā́ssōn, “faster”)

• → English: tachy- (learned)

• “ταχύς”, in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press
• “ταχύς”, in Liddell & Scott (1889) An Intermediate Greek–English Lexicon, New York: Harper & Brothers
• “ταχύς”, in Autenrieth, Georg (1891) A Homeric Dictionary for Schools and Colleges, New York: Harper and Brothers
• ταχύς in Bailly, Anatole (1935) Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
• Bauer, Walter et al. (2001) A Greek–English Lexicon of the New Testament and Other Early Christian Literature, Third edition, Chicago: University of Chicago Press
• ταχύς in Cunliffe, Richard J. (1924) A Lexicon of the Homeric Dialect: Expanded Edition, Norman: University of Oklahoma Press, published 1963
• “ταχύς”, in Slater, William J. (1969) Lexicon to Pindar, Berlin: Walter de Gruyter
• G5036 in Strong, James (1979) Strong’s Exhaustive Concordance to the Bible
• Woodhouse, S. C. (1910) English–Greek Dictionary: A Vocabulary of the Attic Language‎, London: Routledge & Kegan Paul Limited.
  • expeditious idem, page 293.
  • express idem, page 295.
  • fleet idem, page 327.
  • hasty idem, page 387.
  • headlong idem, page 391.
  • hurried idem, page 411.
  • nimble idem, page 558.
  • quick idem, page 665.
  • rapid idem, page 672.
  • sharp idem, page 762.
  • speedy idem, page 801.
  • swift idem, page 848.
• Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN

From Ancient Greek ταχύς (takhús).

ταχύς • (tachýs) m (feminine ταχεία, neuter ταχύ)

1. fast, rapid

   Synonym: αλματώδης (almatódis)

2. sudden