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Jyutping ji5 ngaan5 waan4 ngaan5
Pinyin yǐ yǎn huán yǎn

Definitions (CC-CEDICT)
  1. an eye for an eye (idiom); fig. to use the enemy's methods against him
  2. to give sb a taste of his own medicine
Definitions (Wiktionary)
  1. phrase, idiomatic
    to take an eye for an eye
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    以眼还眼,以牙还牙。
    以眼還眼,以牙還牙。
    yǐ yǎn huán yǎn , yǐ yá huán yá 。
    • An eye for an eye, a tooth for a tooth.
    • An eye for an eye and a tooth for a tooth.
  2. Mandarin
    以眼还眼以牙还牙
    以眼還眼以牙還牙
    yǐ yǎn huán yǎn yǐ yá huán yá
    • An eye for an eye, a tooth for a tooth.
    • An eye for an eye and a tooth for a tooth.
    • Deal with a man as he deals with you.
Examples (粵典–words.hk)
  1. Cantonese
    以牙还牙,以眼还眼
    以牙還牙,以眼還眼
    ji5 ngaa4 waan4 ngaa4, ji5 ngaan5 waan4 ngaan5
    • an eye for an eye, and a tooth for a tooth
Examples (Wiktionary)
  1. Mandarin
    以眼还眼,以牙还牙
    以眼還眼,以牙還牙
    yǐ yǎn huán yǎn , yǐ yá huán yá
    • (literally) an eye for an eye and a tooth for a tooth; tit for tat