Vocabulary : Which word is most appropriate in a formal report?

In formal reports, it is crucial to use professional, objective, and precise language, avoiding colloquialisms or informal expressions. The word "Terminate" is the most appropriate choice because it is a formal verb meaning to bring to an end, commonly used in business, legal, or official contexts to refer to the ending of employment or a contract. It maintains a professional and respectful tone.

• "Fire" is a common but less formal term for dismissing someone from a job.
• "Sack" is an informal, often British English, slang term for dismissal.
• "Boot out" is a highly informal phrasal verb, implying a forceful or abrupt expulsion.

These alternatives are unsuitable for a formal report due to their informal nature, which can undermine the document's credibility and professionalism.