Which word can mean both a basic rule or law and a standard of behavior or morals?

• A. Anterior
• B. Process
• C. Procure
• D. Principle

Answer: (D)

A single word can carry both a basic rule or law and a standard of behavior, and that word is principle. As a rule or law, principle refers to a fundamental truth that explains how things work, such as the principles of physics or the principle underlying a method. As a standard of behavior, it means a guideline for conduct—something you strive to uphold in your actions, like sticking to your principles. For instance, you might say someone acted according to their principles, choosing what is right even when it’s hard. The other words don’t fit because they describe other ideas: anterior relates to location at the front, process is a series of actions, and procure means to obtain. So principle best captures both the rule-based and the conduct-based senses.