結構
けっこう · kekkou · JLPT N5 · na-adj
enough
👌 結構 = tie + construct: well put together, so fine as it is
結 (tie) + 構 (build) first meant a well-made structure. Well built became splendid, then good enough. That is why kekkou desu can mean both that is lovely and no thanks, I have enough.