偶然だなあ！

偶然だなあ！

What a coincidence!

偶然(ぐうぜん)だなあ！

Gūzen da nā!

偶然 (ぐうぜん)

(by) chance; unexpectedly; suddenly; accident; fortuity; by coincidence

だ (だ)

be; is; indicates past or completed action; indicates light imperative

なあ (なあ)

hey; say; look; used to get someone's attention or press one's point

Readings: グウ、たま

Meanings: accidentally, even number, couple, man & wife, same kind

Readings: ゼン、ネン、しか、しか.り、しか.し、さ

Meanings: sort of thing, so, if so, in that case, well