We are talking about the smallest Hebrew letter י (yod) - this is the floor of the vertical bar.
Letters also consist of dashes, the presence or absence of which can change the letter, for example.
Vocalizations appeared according to various sources - in the 6th-7th centuries or the 10th-11th centuries.
Already at the time of Jesus, the Jews spoke Aramaic, and Hebrew was used to read sacred books.
There is a feature in Hebrew, they have practically no vowels. In the example, we write MILKO and say MALAKO.
So why write vowels if we already know how to pronounce correctly?
Another thing is that for hundreds of years the Jews have been speaking a different language, even other languages, because they have scattered all over the world. So we decided to create notes to clarify vowel sounds.
English sounds of their voicingA – אָ - אַ - אֲ - a horizontal stroke (maybe an additional downstroke, like the letter T, but it's important that all the horizontal dashes are A's) O – אֹ – אוֹ - a dot at the top left corner of a word.
example: שָׁלוֹם - (shalom) - peace, tranquility, greeting U – אוּ - אֻ - slanted points, and when using the letter VAV - a point in the middle. E – אֵ - אֶ - אֱ - horizontal dots. I – אִ - אִי - one point down. ' – אְ - two vertical dots - no vowel.
example: שֹׁומְרוֹן (Shomron) - Samaria.
Jehovah or Yahweh?