What is NOT one of the properties of a letter?

The property of a letter that is considered NOT to be one of its defining characteristics is age. Letters, as fundamental components of written language, are associated with tangible properties such as shape, feel, and sound.

Shape refers to the visual appearance of a letter, which is crucial in distinguishing different letters from one another. Each letter has a unique shape that contributes to forming words and conveying meaning.

Feel relates to the tactile sensation that a letter might present when written or printed. This can include aspects like the texture of the writing surface or the physical attributes of the writing implement.

Sound is tied to the phonetic representation of a letter, which is essential in phonics and language instruction. Each letter corresponds to specific sounds, forming the foundation for reading and spelling.

Age, however, does not inherently define a letter's properties. While letters may have historical significance or change in usage over time, this concept does not impact their essential attributes within the framework of language education. Thus, 'age' is not considered a property of a letter.