X stands for unknown and infinite. "X" also has the meaning of "goal" and "hope", and the meaning of some words is vague. It is not easy to translate literally, but to express it with "XXX", and so on.
In sociology, X means "perfection", and a thousand words can be transmitted through X.
In mathematics, x usually represents the value of an unknown quantity in an equation. X represents an unknown number, and letters represent a number. Its size is unknown. It could be 2 or 5. Letters other than x can also be used, such as a, b, etc.
In Roman numerals, x stands for ten.
X is also used to express "kissing", "deep love", "belonging to one's own heart" and "wholeheartedly". It is often used three times after the letter to express a kind of missing, caring and supreme pure love. Words suitable for women's love.