東窗事發 [东－－发]

Jyutping dung1 coeng1 si6 faat3
Pinyin dōng chuāng shì fā

Definitions (CC-CEDICT)

(of a plot etc) to be exposed (idiom)
to come to light

Definitions (粵典–words.hk)

語句
不可告人嘅秘密畀人發現
the secret is found out by others

Definitions (Wiktionary)

verb, of a plot
to come to light; to be exposed

Definitions (Kaifangcidian)

（沒有對應漢語詞彙）