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Jyutping jat1 bat1 siu2 sam1
Pinyin yí bù xiǎo xīn

Definitions (HSK3.0)
  1. HSK3 七一九级词汇表 #4877

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Jyutping jat1 bat1 siu2 sam1
Pinyin yī bu xiǎo xīn ( toneless variant )

Definitions (Wiktionary)
  1. adv
    accidentally; carelessly; during a moment of inattention
    • 他一不小心被玻璃絲劃破了手。
      他一不小心被玻璃丝划破了手。
      tā yī bù xiǎo xīn bèi bō lí sī huá pò le shǒu .
      He accidentally cut his hand on the glass silk.
  2. verb
    to be careless; to have a moment of inattention
    • 路上坑坑窪窪的,騎車的人一不小心就有致命危險。
      路上坑坑洼洼的,骑车的人一不小心就有致命危险。
      lù shàng kēng kēng wā wā de , qí chē de rén yī bù xiǎo xīn jiù yǒu zhì mìng wēi xiǎn .
      Pot holes can be lethal for the unwary cyclist.

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Jyutping jat1 bat1 siu2 sam1
Pinyin yī bù xiǎo xīn

Definitions (Wiktionary)
  1. adv
    accidentally; carelessly; during a moment of inattention
    • 他一不小心被玻璃絲劃破了手。
      他一不小心被玻璃丝划破了手。
      tā yī bù xiǎo xīn bèi bō lí sī huá pò le shǒu .
      He accidentally cut his hand on the glass silk.
  2. verb
    to be careless; to have a moment of inattention
    • 路上坑坑窪窪的,騎車的人一不小心就有致命危險。
      路上坑坑洼洼的,骑车的人一不小心就有致命危险。
      lù shàng kēng kēng wā wā de , qí chē de rén yī bù xiǎo xīn jiù yǒu zhì mìng wēi xiǎn .
      Pot holes can be lethal for the unwary cyclist.
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)

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Jyutping jat1 bat1 siu2 sam1
Pinyin yī bu xiǎo xīn

Definitions (CC-CANTO)
  1. Accidentally

一不小心 [----]

Jyutping
Pinyin yī bù xiǎo xīn

Definitions (CC-CEDICT)
  1. to be a little bit careless; to have a moment of inattentiveness
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    汤姆一不小心买了一件尺码不对的外套。
    湯姆一不小心買了一件尺碼不對的外套。
    tāng mǔ yī bù xiǎo xīn mǎi le yī jiàn chǐ mǎ bù duì de wài tào 。
    • Tom bought the wrong size coat by mistake.
Examples (Wiktionary)
  1. Mandarin
    路上坑坑洼洼的,骑车的人一不小心就有致命危险。
    路上坑坑窪窪的,騎車的人一不小心就有致命危險。
    lù shàng kēng kēng wā wā de , qí chē de rén yī bù xiǎo xīn jiù yǒu zhì mìng wēi xiǎn .
    • Pot holes can be lethal for the unwary cyclist.
  2. Mandarin
    他一不小心被玻璃丝划破了手。
    他一不小心被玻璃絲劃破了手。
    tā yī bù xiǎo xīn bèi bō lí sī huá pò le shǒu .
    • He accidentally cut his hand on the glass silk.