revolve

To revolve means to move in a circle around a central point, either in a real physical way or in a figurative way. In physical use, it usually describes one thing going around another, as in "The Earth revolves around the sun once every year." This is different from "rotate," which more often describes something turning on its own axis.

In everyday English, revolve is very often used in a figurative sense. If a discussion revolves around money, then money is the main subject that everything returns to. If someone's daily routine revolves around work, then work is the center of their time, energy, and decisions. In this use, the word suggests that one thing stands at the center while other parts connect to it.

The word can also be used for thoughts and attention that keep circling back to the same point. "Her thoughts revolved around the same problem all day" suggests that she could not stop thinking about it. This idea of circling around a center helps explain both the literal and figurative uses. Whether it is a planet, a story, a conversation, or a person's life, revolve describes movement or attention that stays tied to one central point.