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Jyutping zou2 zi1 gam1 jat6 , ho4 bit1 dong1 co1
Pinyin zǎo zhī jīn rì , hé bì dāng chū

Definitions (Wiktionary)
  1. phrase, idiomatic
    to regret one's past behaviour
    (syn.) 悔不當初, 早知拉尿, 悔不当初, 何必当初, 企到天光, 何必當初, 早知今日, 既有今日

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Jyutping zou2 zi1 gam1 jat6 ho4 bit1 dong1 co1
Pinyin zǎo zhī jīn rì , hé bì dāng chū

Definitions (粵典–words.hk)
  1. 語句
    知道​會有​而家​噉​嘅​收​場​嘅​話​,​當初​就​未必​會​噉​做​;​用​嚟​表示​嗟​嘆
    if one had known it would come to this, he would not have acted so; used to sigh
Examples (粵典–words.hk)
  1. Cantonese
    早知今日,何必当初
    早知今日,何必當初
    zou2 zi1 gam1 jat5, ho4 bit1 dong1 co1
    • if one had known it would come to this, he would not have acted so