What part of speech is the word initial?

The word "initial" can be a few different parts of speech depending on how it's used:

* Adjective: Describing something as being at the beginning or first part.

* Example: "The initial cost of the project was high."

* Noun: Referring to the first letter of a word or name.

* Example: "The initial of her name is 'S'."

* Verb: Meaning to put the first letter or letters of a word on something, often as a signature.

* Example: "Please initial the document at the bottom."

Let me know if you have a specific sentence in mind and I can tell you which part of speech it is being used as!