Tilde (noun)

1. A diacritical mark (~~) placed above a letter to indicate pronunciation or to mark a nasal sound.
2. A symbol (~~) used in mathematics and computer science to represent various operations, such as negation, bitwise NOT, or approximate equality.

Origin:

From spanish 'tilde', from latin 'titulus' meaning 'title, superscription'.

Examples:

1. In Spanish, the tilde is often used to indicate stress on a syllable.
2. The tilde is used in programming to denote bitwise NOT, such as ~5.
3. To denote an approximate value, we use the tilde, such as x ~ 3.
4. In Portuguese, the tilde is used to mark a nasal sound, such as ã.
5. The file path ~/Desktop/ indicates the Desktop folder in the user's home directory.