- ἕως (héōs) – Attic
- αὔως (aúōs) – Aeolic
- ᾱ̓ώς (āṓs) – Doric
- ᾱ̓́ας (ā́as) – Boeotian
- ᾱ̓βώρ (ābṓr) – Laconian
From Proto-Hellenic *āhwōs = *ᾱϝ̔ως (*āhwōs), from Proto-Indo-European *h₂éwsōs (“dawn”), which was also personified as a goddess of dawn in Proto-Indo-European religion, corresponding to Ancient Greek goddess Ἠώς (Ēṓs). Cognates include Latin Aurora/aurora, Sanskrit उषस् (uṣás, “dawn; Ushas”) and possibly Old English Ēostre and Old Armenian այգ (ayg), առաւաւտ (aṙawawt).
- The morning red, daybreak, dawn
- Dawn as a length of time: morning
- (accusative, ἠῶ) through the morning
- A morning as a unit of time: day
- The direction of dawn, the East
Epic locative is ἠῶθι (ēôthi).
- ἠώς in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press
- ἠώς in Liddell & Scott (1889) An Intermediate Greek–English Lexicon, New York: Harper & Brothers
- ἠώς in Autenrieth, Georg (1891) A Homeric Dictionary for Schools and Colleges, New York: Harper and Brothers
- ἠώς in Cunliffe, Richard J. (1924) A Lexicon of the Homeric Dialect: Expanded Edition, Norman: University of Oklahoma Press, published 1963