Based on what I learned in my Philosophy subject, Philosophy comes from two Greek words: "philein" which means love and "sophia" which means wisdom. It is about how people view and think about the world and our society. Philosophy is about the ideas of people. The father of philosophy is Thales while the father of Modern Philosophy is Rene Descartes.
Philosophy is full of questioning because through these questions, we understand the world. Curiosity about how something happened or formed is already like questioning about something. With these questions, we seek answers about it and learn something; helping us know what they really are :)