Ὑάς

See also: ὕας

Ancient Greek

From ῡ̔́ω (hū́ō) +‎ -ᾰ́ς (-ắs).

(Attic, Ionic, etc.):

(Lyric):

The vowel in the first syllable is generally short, even in Epic, but Euripedes treats it as long in Electra and Ion.^[1]^[2]

Ῡ̆̔ᾰ́ς • (Hū̆ắs) f (genitive Ῡ̆̔ᾰ́δος); third declension

(chiefly in the plural) one of the Hyades
- c. 415 BCE, Euripides, Electra 468
- 413 BCE, Euripides, Ion 1156

Third declension of ἡ Ῠ̔ᾰ́ς; τῆς Ῠ̔ᾰ́δος (Attic)

Case / #	Singular	Dual	Plural
Nominative	ἡ Ῠ̔ᾰ́ς hē Hŭắs	τὼ Ῠ̔ᾰ́δε tṑ Hŭắde	αἱ Ῠ̔ᾰ́δες hai Hŭắdes
Genitive	τῆς Ῠ̔ᾰ́δος tês Hŭắdos	τοῖν Ῠ̔ᾰ́δοιν toîn Hŭắdoin	τῶν Ῠ̔ᾰ́δων tôn Hŭắdōn
Dative	τῇ Ῠ̔ᾰ́δῐ tēî Hŭắdĭ	τοῖν Ῠ̔ᾰ́δοιν toîn Hŭắdoin	ταῖς Ῠ̔ᾰ́σῐ / Ῠ̔ᾰ́σῐν taîs Hŭắsĭ(n)
Accusative	τὴν Ῠ̔ᾰ́δᾰ tḕn Hŭắdă	τὼ Ῠ̔ᾰ́δε tṑ Hŭắde	τᾱ̀ς Ῠ̔ᾰ́δᾰς tā̀s Hŭắdăs
Vocative	Ῠ̔ᾰ́ς Hŭắs	Ῠ̔ᾰ́δε Hŭắde	Ῠ̔ᾰ́δες Hŭắdes
Notes:	This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension. Nominative singular -ς (-s) arose by reduction of the original cluster -δς (-ds).

Third declension of Ῠ̔ᾰ́ς; Ῠ̔ᾰ́δος (Epic)

Case / #	Singular	Dual	Plural
Nominative	Ῠ̔ᾰ́ς Hŭắs	Ῠ̔ᾰ́δε Hŭắde	Ῠ̔ᾰ́δες Hŭắdes
Genitive	Ῠ̔ᾰ́δος Hŭắdos	Ῠ̔ᾰ́δοιῐ̈ν Hŭắdoiĭ̈n	Ῠ̔ᾰ́δων Hŭắdōn
Dative	Ῠ̔ᾰ́δῐ Hŭắdĭ	Ῠ̔ᾰ́δοιῐ̈ν Hŭắdoiĭ̈n	Ῠ̔ᾰ́σῐ / Ῠ̔ᾰ́σῐν / Ῠ̔ᾰ́δεσῐ / Ῠ̔ᾰ́δεσῐν / Ῠ̔ᾰ́δεσσῐ / Ῠ̔ᾰ́δεσσῐν Hŭắsĭ(n) / Hŭắdesĭ(n) / Hŭắdessĭ(n)
Accusative	Ῠ̔ᾰ́δᾰ Hŭắdă	Ῠ̔ᾰ́δε Hŭắde	Ῠ̔ᾰ́δᾰς Hŭắdăs
Vocative	Ῠ̔ᾰ́ς Hŭắs	Ῠ̔ᾰ́δε Hŭắde	Ῠ̔ᾰ́δες Hŭắdes
Notes:	Dialects other than Attic are not well attested. Some forms may be based on conjecture. Use with caution. Nominative singular -ς (-s) arose by reduction of the original cluster -δς (-ds).

Third declension of ἡ Ῡ̔ᾰ́ς; τῆς Ῡ̔ᾰ́δος (Lyric)

Case / #	Singular	Dual	Plural
Nominative	ἡ Ῡ̔ᾰ́ς hē Hūắs	τὼ Ῡ̔ᾰ́δε tṑ Hūắde	αἱ Ῡ̔ᾰ́δες hai Hūắdes
Genitive	τῆς Ῡ̔ᾰ́δος tês Hūắdos	τοῖν Ῡ̔ᾰ́δοιν toîn Hūắdoin	τῶν Ῡ̔ᾰ́δων tôn Hūắdōn
Dative	τῇ Ῡ̔ᾰ́δῐ tēî Hūắdĭ	τοῖν Ῡ̔ᾰ́δοιν toîn Hūắdoin	ταῖς Ῡ̔ᾰ́σῐ / Ῡ̔ᾰ́σῐν taîs Hūắsĭ(n)
Accusative	τὴν Ῡ̔ᾰ́δᾰ tḕn Hūắdă	τὼ Ῡ̔ᾰ́δε tṑ Hūắde	τᾱ̀ς Ῡ̔ᾰ́δᾰς tā̀s Hūắdăs
Vocative	Ῡ̔ᾰ́ς Hūắs	Ῡ̔ᾰ́δε Hūắde	Ῡ̔ᾰ́δες Hūắdes
Notes:	Dialects other than Attic are not well attested. Some forms may be based on conjecture. Use with caution. Nominative singular -ς (-s) arose by reduction of the original cluster -δς (-ds).

Woodhouse, S. C. (1910), English–Greek Dictionary: A Vocabulary of the Attic Language‎^[1], London: Routledge & Kegan Paul Limited, page 1,013
Ὑάς in Bailly, Anatole (1935), Le Grand Bailly: Dictionnaire grec-français, Paris: Hachette
“Ὑάδες”, in Liddell & Scott (1940), A Greek–English Lexicon, Oxford: Clarendon Press
“Ὑάδες”, in Liddell & Scott (1889), An Intermediate Greek–English Lexicon, New York: Harper & Brothers