îⁿ-ô͘圓弧

circular arc

circular arc; to reunite; to have a reunion; to mediate; to help to effect a compromise

geometry

English Wiktionary, “圓弧” (CC BY-SA 4.0) — https://en.wiktionary.org/wiki/%E5%9C%93%E5%BC%A7 · confidence: Medium (Wiktionary)