Avestan U 𐬎

The sound is a short close back u, the tongue high and drawn back and the lips rounded. It heads the last of the eight vowel pairs. Writing a vowel as a full letter costs space and time, and every scribe who ever worked in a Semitic hand had reasons not to do it. This alphabet does it sixteen times over, which is a fair indication that legibility for a reader who already knew the words was not the goal. Reproducibility of a sound was. It stands fifteenth in the alphabet as a whole and fifteenth of the sixteen vowel letters, between Avestan Ii and Avestan Uu. Nothing in that placement was handed down. The sequence was arranged by whoever assembled the alphabet, and it records their view of how the sounds of the language stand in relation to one another.

The people who drew up this alphabet were not recording a language they spoke. Avestan had ceased to be anybody's mother tongue centuries before, and what they had in front of them was a recitation preserved by priests who had learned it by ear. The letters record that recitation, sound by sound, at the level of detail the reciters maintained. One sign to one sound is the rule this alphabet works to, and it is easier to state than to keep. Most scripts break it somewhere, usually where a sound is rare enough that no scribe could be bothered, and the interest of this one lies in how few exceptions it allows itself.

By the time the sequence reaches the u pair the pattern has been declared seven times and is unmistakable. That regularity is itself evidence that the script was drawn up at one time by people working to a plan, rather than accumulated by use. Vowel writing is the innovation that separates this alphabet from everything else written in Iran at the time. The letterforms are Pahlavi and the right to left direction is Pahlavi. The vowels are not: they are full letters, and they come first in the order.

No Avestan manuscript survives from earlier than the thirteenth century of the common era. Every copy in existence is therefore many centuries younger than the alphabet, and the alphabet is many centuries younger again than the words. What reaches a modern edition has passed through both gaps. In the digital record the letter is encoded at U+10B0E AVESTAN LETTER U. The block covers the letters together with a small set of punctuation marks used in the manuscripts. Standardising it settled, for digital purposes at least, a question the printed editions had answered in several different ways, which is how many letters the alphabet has. The practical test of the alphabet is whether a reciter reading from it produces what the tradition received, and by that test the fineness of its distinctions is not ornament. Each of the signs that looks redundant from outside answers to something a reciter kept apart.