Initial
Initial , adjective
[Latin initialis, from initium a going in, entrance, beginning, from inire to go into, to enter, begin; pref. in- in + ire to go: compare French initial. See Issue, and compare Commence.]
1.
Of or pertaining to the beginning; marking the commencement; incipient; commencing; as, the initial symptoms of a disease.
2.
Placed at the beginning; standing at the head, as of a list or series; as, the initial letters of a name.
Initial , noun
The first letter of a word or a name.
Initial , transitive verb
To put an initial to; to mark with an initial of initials. [Rare]