偶 (Kanji for coincidence)

Onyomi

GUU

It was a coincidence that I ran into that person just as I was talking about the time he made GOOEY soup.

たま ( に )

occasionally
★★☆☆☆

偶然(ぐうぜん) で or に

coincidence ★★★★★
偶 (coincidence) + 然 (nature) = 偶然 (coincidence)

accidentally, coincidence

配偶者(はいぐうしゃ)

spouse ☆☆☆☆☆ NP
配 (distribute) + 偶 (coincidence) + 者 (professional) = 配偶者 (spouse )

spouse (you only need this if you are getting married to a Japanese and want a 'spouse visa.')