/ɪˈnɪʃəl/
Existing or occurring at the beginning of a process or period of time.
"The initial reaction to the news was one of complete disbelief."
Relating to the first letter of a name.
"Please sign your initial on the bottom of each page of the contract."
The first letter of a name or a word.
"Her initials are A.M. for Alice Miller."
To mark or sign a document with one's initials to show approval or acknowledgment.
"The manager initialed the proposal before sending it to the board."