To mediate or intercede to resolve a conflict, or to find a way to redeem a difficult situation and leave room for maneuver

Ancient open-air altar for worshipping Heaven; specifically, the three-tiered white marble ritual platform at the Temple of Heaven in Beijing used by Ming and Qing emperors

A round socket and a square tenon do not fit together; describes people or things that are incompatible or ill-suited to each other.

the cosmic power or providence that governs the universe

circular or ring-like in shape

Room or leeway to change a plan, save a situation, or reach a compromise; a margin for error.