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Jyutping sik1 ho2 ji4 zi2
Pinyin shì kě ér zhǐ

Definitions (CC-CEDICT)
  1. (idiom) to refrain from going too far; to know when to stop
Definitions (粵典–words.hk)
  1. 語句
    做到​適量​就​應該​停​,​唔​應該​做​過龍
    to not overdo something; to stop before going too far
    • 你飲酒應該適可而止,唔可以過量。
      你饮酒应该适可而止,唔可以过量。
      nei5 jam2 zau2 jing1 goi1 sik1 ho2 ji4 zi2, m4 ho2 ji5 gwo3 loeng6.
      You should mind how much alcohol you drink. You can't drink too much.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to stop when appropriate; not to overdo; enough is enough
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    适可而止
    適可而止
    shì kě ér zhǐ
    • Quit while you're ahead.
    • Quit while you are ahead.
Examples (粵典–words.hk)
  1. Cantonese
    你饮酒应该适可而止,唔可以过量。
    你飲酒應該適可而止,唔可以過量。
    nei5 jam2 zau2 jing1 goi1 sik1 ho2 ji4 zi2, m4 ho2 ji5 gwo3 loeng6.
    • You should mind how much alcohol you drink. You can't drink too much.
  2. Cantonese
    不过以后饮酒要适可而止,过多只会失事!
    不過以後飲酒要適可而止,過多只會失事!
    bat1 gwo3 ji5 hau6 jam2 zau2 jiu3 sik1 ho2 ji4 zi2 gwo3 do1 zi2 wui6 sat1 si6.
    • But you must be more moderate in your drinking. Too much wine can easily lead to serious trouble!
  3. Cantonese
    好食还好食,始终「一粒荔枝三把火」,燥热嘅生果要适可而止呀。
    好食還好食,始終「一粒荔枝三把火」,燥熱嘅生果要適可而止呀。
    • Inspite of it's great taste, don't forget "one lychee is three burning torches", you should limit your dose on the fruit of "dry and hot" nature.