Here's a breakdown of the etymology:
* "Actus" (Latin): Meaning "act" or "deed."
* "Actuarius": Originally referred to an official who recorded official acts and deeds, particularly those related to financial transactions, taxes, or legal matters.
* "Actuary": Evolved over time to specifically refer to a professional who calculates and manages financial risks, particularly in the insurance industry.
Therefore, the word "actuary" ultimately traces back to the ancient Roman practice of carefully recording and managing financial information, highlighting the core function of this profession even today.