| Aicme Beithe | Aicme Muine | ||
| ᚁ | Beith | ᚋ | Muin |
| ᚂ | Luis | ᚌ | Gort |
| ᚃ | Fearn | ᚍ | nGéadal |
| ᚄ | Sail | ᚎ | Straif |
| ᚅ | Nion | ᚏ | Ruis |
| Aicme hÚatha | Aicme Ailme | ||
| ᚆ | Uath | ᚐ | Ailm |
| ᚇ | Dair | ᚑ | Onn |
| ᚈ | Tinne | ᚒ | Úr |
| ᚉ | Coll | ᚓ | Eadhadh |
| ᚊ | Ceirt | ᚔ | Iodhadh |
| Forfeda | |||
| ᚕ | Éabhadh | ||
| ᚖ | Ór | ||
| ᚗ | Uilleann | ||
| ᚘ | Ifín | ᚚ | Peith |
| ᚙ | Eamhancholl |
Sail or Saille is the Irish name of the fourth letter of the Ogham alphabet, ᚄ, meaning "willow". The name is related to Welsh helyg(en) and Latin salix. Its Proto-Indo-European root was *sal-. Its phonetic value is [s].
In the medieval kennings, called Bríatharogam or Word Ogham the verses associated with sail are:
lí ambi - "pallor of a lifeless one" (Word Ogham of Morann mic Moín)
lúth bech - "sustenance of bees" (Word Ogham of Mac ind Óc)
tosach mela - "beginning of honey" (Word Ogham of Culainn)