Which word means to seek ultimate causes and principles?

The term that conveys the idea of seeking ultimate causes and principles is "philosophize." This word derives from "philosophy," which fundamentally concerns itself with the nature of knowledge, reality, and existence. When one philosophizes, they engage in deep thinking and inquiry, often striving to understand the underlying reasons and frameworks that shape our thoughts, beliefs, and the world around us. This pursuit aligns closely with the essence of philosophical inquiry, which questions and explores fundamental truths about life and existence.

The other options do not pertain to seeking ultimate causes or principles. "Phosphorize" relates to the process of making something phosphorescent, which is a chemical or physical change, not a philosophical activity. "Philanthropize" refers to engaging in charitable acts or promoting welfare for others, centered more on social action than on philosophical inquiry. "Procrastinate" means to delay or postpone actions or decisions, which is contrary to the proactive nature of philosophizing. Thus, "philosophize" distinctly encapsulates the essence of searching for deeper understanding and fundamental truths.