Akshara
Akshara is a Sanskrit word that translates to "imperishable," "undecaying," or "letter." In various Indian philosophies and spiritual traditions, it often refers to the fundamental, eternal, and unchanging essence of reality or consciousness. It can also denote the unmanifest, primordial sound from which the universe is believed to have originated.
In the context of language, particularly Sanskrit and its derivatives like Hindi and other Indic scripts, akshara