Ruis (ᚏ) is the fifteenth letter of the Ogham alphabet, derived from ruise "red". Its Proto-Indo-European root was *reudh- 'red'. Its phonetic value is [r].
References
Ruis (letter) Wikipedia(Text) CC BY-SA
Ruis (ᚏ) is the fifteenth letter of the Ogham alphabet, derived from ruise "red". Its Proto-Indo-European root was *reudh- 'red'. Its phonetic value is [r].