Which term means to restore something to an earlier condition or to revive it?

The term that best means to restore something to an earlier condition or to revive it is "renew." This word conveys the idea of making something fresh or new again, which aligns perfectly with the concept of restoring to a previous state.

While "renovate" is often associated with improving or modernizing a space or structure, it may not specifically imply a return to a previous condition. Similarly, "rebuild" indicates constructing something again after it has been damaged or destroyed, and "reshape" suggests altering the form of something rather than restoring it. Therefore, "renew" stands out as the most appropriate choice to express the notion of reviving or returning something to a prior state.