偶然 /ɡuːzeɴ/ NounEnglishcoincidencePortuguêscoincidênciaExample私たちが同じタイミングで到着するなんて、不思議な偶然(ぐうぜん)でしたね。It was a strange coincidence that we both arrived at the same time.「偶然」は最も汎用性が高い表現です。