initial

US /ɪˈnɪʃ.əl/
UK /ɪˈnɪʃ.əl/
"initial" picture
1.

existing or occurring at the beginning; first.

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•
The initial phase of the project was successful.
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My initial reaction was surprise.
:
firstearliestopeningprimaryoriginal
:
finallastultimate
1.

the first letter of a name or word, typically a person's first name or a significant word in a phrase.

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Please write your initials at the bottom of the form.
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Her necklace had her boyfriend's initial on it.
:
monogramfirst letter
1.

mark (a document) with one's initials, typically as a sign of approval or to indicate that one has read it.

:
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Please initial each page of the contract.
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She initialed the changes to confirm her approval.
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signautographendorse
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initiateinitiativeinitiallyinitiationinitiateinitial public offering