A note on building words from letters:
The hebrew alphabet is more than a writing form. Words are called Teivot, which has the connotation of box, or container.
A word is a container of meaning, stemming from the building blocks of creation. In Genesis, the creation of all existence is described as sayings of God.(1) Our Sages teach that God formed the world through ten sayings. This book describes each letter of the aleph bet.
General concepts on root words:
In a shoresh, or root word, there are nearly always 3 main letters. The position of each letter describes the word’s meaning.
1st position—describes what is happening
2nd position—describes how it is happening
3rd position—describes where it is happening.
To illustrate: using the word חלד (cheled), we can see how this concept applies.
ח indicates a connection
ל signifies growth
ד signifies a limitation
Through this concept, the word cheled is seen to mean a connection occurring through growth, in a location, concept, or setting of limitation. For example, death is a moment of connection with the infinite through growth into a new phase, and it occurs through a limitation—death. After death, there is no more action a person can take. As such, death acts as a limiter.
Aleph:
Value: 1
mother letter
created from 3 letters: yod, vav, yod
relationship: keter
Phonetical classification: Guttural
Vowel point: Patakh
Signification of name: ox
Aleph is the beginning of the aleph bet. It is before everything. (2)
Aleph is the thesis, the first third of the basic concepts. (3) It is a silent consonant. (4)
Aleph never occurs as a suffix. As a prefix, it indicates first-person future.
The aleph looks like the brain. (5) The upper right yod is chokhmah, the upper right of the brain. The lower left yod is Hod. The line in the middle is a vav, representing the six sefirot in between.
mem
Value: 40
mother letter
created from:
relationship: Nukvah/externally daat, internally keter
phonetical classification: labial
Signification of name: water
Mem represents the present, which is the womb of the future.
The open mem is female, and the closed mem is male. The open mem is the womb, open from below.
The letter mem itself is spelled mem-mem (מם), including male and female. This is since it contains chokhmah and binah. (22)
The value of mem alludes to the 40 days in which the embryo is formed in the womb.
shin
Value: 300
mother letter
created from: vav, vav, zayin
relationship: confluence of netzakh+hod+yesod into malkhuth
phonetical classification: dental
Signification of name: tooth
The mother letters form the first, middle, and last letters of the aleph bet. Since tav is a double letter, the final mother letter is shin.
The mother letters represent 3 distinct states of consciousness: silence, harmonious, and static/white noise. The mother letters’ pronunciation depict this, and can be used to rapidly switch between states to climb. One climbs in a swaying right to left motion.
Shin signifies multitude of deeds with a unity of purpose. (29)
As a prefix, Shin means “that”; it connects and specifies. Its 3 heads represent the 3 basic concepts: thesis, antithesis, and synthesis. These 3 exist to bring a single goal: Malchuth of Ain Sof. (30) This is the single point at the bottom of the Shin. Shin is the answer to the why of creation.
In its form, Shin represents this by looking like the roots of a tree. Every branch of the tree can be the root of a new tree. (31)
Rabbi Jill Hammer teaches,
בַּעֲרָ֖א Baara (fire).
חוּשִׁ֥ים Chushum (feelings or senses).
חֹ֣דֶשׁ Chodesh (moon)
The final letters of their names are alef, mem and shin. The Sefer Y'tzirah, an ancient work of Jewish mysticism, calls these letters [which are the first, center and final letters of the Hebrew alphabet] the "three mothers of the universe.
https://feminismandreligion.com/2018/05/22/the-three-mothers-feminine-elements-and-the-early-kabbalah-by-jill-hammer/