大砲が偶然発射してしまった。

大砲が偶然発射してしまった。

The cannon went off by accident.

大砲(たいほう)が偶然(ぐうぜん)発射(はっしゃ)してしまった。

Taihō ga gūzen hasshashiteshimatta.

大砲 (たいほう)

gun; cannon; artillery

が (が)

indicates sentence subject (occasionally object); indicates possessive (esp. in literary expressions); but; however; still; and

偶然 (ぐうぜん)

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

発射 (はっしゃ)

firing; shooting; discharge; catapult; ejaculation (sl)

Readings: ダイ、タイ、おお-、おお.きい、 -おお.いに

Meanings: large, big

Reading: ホウ

Meanings: cannon, gun

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

Readings: ハツ、ホツ、た.つ、あば.く、おこ.る、つか.わす、はな.つ

Meanings: departure, discharge, publish, emit, start from, disclose, counter for gunshots

Readings: シャ、い.る、さ.す、う.つ

Meanings: shoot, shine into, onto, archery