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Jyutping gwaat3 muk6 soeng1 hon1
Pinyin guā mù xiāng kàn

Definitions (CC-CEDICT)
  1. to have a whole new level of respect for sb or sth
  2. to sit up and take notice (of sb's improved performance etc)
Definitions (粵典–words.hk)
  1. 語句
    對​某個​人​嘅​睇​法​變​好
    to treat a person with increased respect; literally: to look at a person with new eyes
    • 佢今次嘅表現真係令我刮目相看。
      佢今次嘅表现真系令我刮目相看。
      keoi5 gam1 ci3 ge3 biu2 jin6 zan1 hai6 ling6 ngo5 gwaat3 muk6 soeng1 hon1.
      Her performance impressed me.
Definitions (Wiktionary)
  1. phrase, idiomatic
    to be astonished by someone's progress
  2. phrase, idiomatic
    to treat someone with renewed respect
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    我对你刮目相看了。
    我對你刮目相看了。
    wǒ duì nǐ guā mù xiāng kàn le 。
    • I'm seeing you in a new light.
Examples (粵典–words.hk)
  1. Cantonese
    佢今次嘅表现真系令我刮目相看。
    佢今次嘅表現真係令我刮目相看。
    keoi5 gam1 ci3 ge3 biu2 jin6 zan1 hai6 ling6 ngo5 gwaat3 muk6 soeng1 hon1.
    • Her performance impressed me.