initial
Existing or occurring at the beginning of a process or sequence. / Relating to the first letter of a name. / The first letter of a name or a word.
/ɪˈnɪʃəl/
AdjectiveNoun
pl: initials
This term conveys a sense of the very first stage of a progression, often implying that subsequent changes or developments will follow. It is frequently used in professional or technical contexts to describe a starting point, such as an initial investment or an initial draft, suggesting a preliminary state that is subject to revision.
When used as a noun, the word refers specifically to the first letter of a person's name. In legal or formal documentation, using initials serves as a shorthand for a full signature to verify that specific pages or clauses have been read and accepted.