,? (schwa) is one of the extended Latin letters. Its lowercase and uppercase letters are inverted E letters.

In the Latin alphabet versions of Azerbaijani and Chechen, vowels/? /。

And in the international phonetic alphabet, lowercase? Used to represent middle vowels (see weak sound).

In addition, there is a pan-Nigerian letter? ,? Letters, lowercase letters are similar in shape to this letter, and they are also inverted E, and uppercase letters are inverted E.

Source of letters:

The letter e may be produced by a symbol of a person raising his hands, just like the hieroglyphics of ancient Egypt, which appeared in Sinai Peninsula around 1500 BC. This symbol means happiness or joy to the Egyptians.

Around 1000 BC, this symbol was a specific linear form in Biblus (an ancient Mediterranean port city, located in Jubail, north of Beirut, Lebanon, and became a prosperous Phoenician city in the second millennium BC) and other parts of Phoenicia and the center of Canaan, for all linear forms. This symbol is called he in Semitic, just like the pronunciation of H in English.

When the Greeks began to write from left to right, they reversed the symbols in the middle to make it easier to write. They denied the standard of semu H and gave it a new standard-vowel E.

They call this symbol epsilon, which means short e (abbreviation e). The Romans adopted this symbol as the capital letter e in Latin. This symbol has been applied from Latin to English without change. Greek and Roman scripts changed the letters to make them more suitable for writing. At this time, English handwriting and printing have become lowercase e.