ἵππος

See also: ίππος

Ancient Greek

From Proto-Hellenic *íkkʷos (compare Mycenaean Greek 𐀂𐀦 (i-qo)), from Proto-Indo-European *h₁éḱwos, from *h₁oh₁ḱu- (“swift”). Unexplained is ἱ (hi) for ἐ (e). Cognates include Sanskrit अश्व (áśva), Latin equus, Gaulish epos, Old Armenian էշ (ēš, “donkey”) and Old English eoh.

ῐ̔́ππος • (híppos) m or f (genitive ῐ̔́ππου); second declension

(Epic, Attic, Ionic, Doric, Koine)

Second declension of ὁ, ἡ ῐ̔́ππος; τοῦ, τῆς ῐ̔́ππου (Attic)

Case / #	Singular	Dual	Plural
Nominative	ὁ, ἡ ῐ̔́ππος ho, hē híppos	τὼ ῐ̔́ππω tṑ híppō	οἱ, αἱ ῐ̔́πποι hoi, hai híppoi
Genitive	τοῦ, τῆς ῐ̔́ππου toû, tês híppou	τοῖν ῐ̔́πποιν toîn híppoin	τῶν ῐ̔́ππων tôn híppōn
Dative	τῷ, τῇ ῐ̔́ππῳ tôi, têi híppōi	τοῖν ῐ̔́πποιν toîn híppoin	τοῖς, ταῖς ῐ̔́πποις toîs, taîs híppois
Accusative	τὸν, τὴν ῐ̔́ππον tòn, tḕn híppon	τὼ ῐ̔́ππω tṑ híppō	τοὺς, τᾱ̀ς ῐ̔́ππους toùs, tā̀s híppous
Vocative	ῐ̔́ππε híppe	ῐ̔́ππω híppō	ῐ̔́πποι híppoi
Notes:	This table gives Attic inflectional endings. For declension in other dialects, see Appendix:Ancient Greek dialectal declension.

When used as a collective noun ("horse, cavalry"), this word is always feminine singular, even with numerals.
460 BCE – 420 BCE, Herodotus, Histories 7.41:
μετὰ δὲ ἵππος ἄλλη χιλίη ἐκ Περσέων ἀπολελεγμένη
metà dè híppos állē khilíē ek Perséōn apolelegménē
and after them came another thousand horsemen chosen out from the Persians