shva
Shva is a diacritic sign used in the Hebrew writing system as part of the niqqud (vowel pointing) system. It is not a letter, but a mark placed under a consonant to indicate the status of the vowel in that syllable. The symbol for shva consists of two vertical dots beneath the consonant.
There are two main types of shva. Shva na (vocal shva) is a light or short vowel,
In addition to indicating vowel presence or absence, shva interacts with other niqqud marks to shape syllable
Historically, shva originated in the Masoretic textual tradition and is part of the Tiberian system of vowel