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Jyutping koi3 taan3
Pinyin kǎi tàn

Definitions (CC-CEDICT)
  1. to sigh with regret
  2. lament
Definitions (粵典–words.hk)
  1. 動詞
    因為​某​啲​事覺​得​感觸​而​嘆息​;​有無奈​、​惋惜​嘅​意味
    to sigh with emotion e.g. regret
    • 唔好成日慨嘆,聽日努力啲啦!
      唔好成日慨叹,听日努力啲啦!
      m4 hou2 seng4 jat6 koi3 taan3, ting1 jat6 nou5 lik6 di1 laa1!
      Do not always sigh with regret. Work harder tomorrow!
  2. 參看
    慨歎
Definitions (Wiktionary)
  1. verb
    to sigh with regret; to lament
    (syn.) 感叹, 兴叹, 道嘆, 慷慨, 嗟嘆, 興嘆, 叹惜, 嗟叹, 道叹, 感嘆, 嘆惜
Examples (粵典–words.hk)
  1. Cantonese
    唔好成日慨叹,听日努力啲啦!
    唔好成日慨嘆,聽日努力啲啦!
    m4 hou2 seng4 jat6 koi3 taan3, ting1 jat6 nou5 lik6 di1 laa1!
    • Do not always sigh with regret. Work harder tomorrow!
  2. Cantonese
    慨叹
    慨嘆
    • lament; sigh