ἰός (ios): all forms
ἰός means “arrow; poison”. Below is its full declension in Ancient Greek.
Positive
| Masculine | Neuter | |
|---|---|---|
| Nominative | ἰός | ἰόν |
| Genitive | ἰοῦ | ἰοῦ |
| Dative | ἰῷ | ἰῷ |
| Accusative | ἰόν | ἰόν |
| Vocative | ἰέ | ἰόν |
| Masculine | Neuter | |
|---|---|---|
| Nominative | ἰοί | ἰά |
| Genitive | ἰῶν | ἰῶν |
| Dative | ἰοῖς | ἰοῖς |
| Accusative | ἰούς | ἰά |
| Vocative | ἰοί | ἰά |
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.