noun
serious matter; major incident; crisis
Refers to a situation that has become a big problem or a grave concern, often implying escalation. Compare with 大事 (だいじ), which means 'important' or 'precious'.
See also: 大事 (だいじ)
小さなミスが大事になってしまった。
A small mistake turned into a serious matter.
彼の発言が大事に発展する
I didn't think his remark would develop into a major incident.
大事 (だいじ) means 'important' or 'precious', while 大事 (おおごと) means 'serious matter' or 'crisis'. The reading and context distinguish them.
Compound of 大 (おお, 'big') and 事 (こと, 'matter'). The reading おおごと is a straightforward combination, while the same kanji can also be read だいじ with a different nuance.