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Jyutping sat1 ziu1
Pinyin shī jiāo

Definitions (粵典–words.hk)
  1. 動詞
    指影​相​、​攝錄​果陣​失去​焦點​、​對​焦失敗​,​令想​影​嘅​主​體​唔​清晰
    out of focus, fail to focus when taking video or photograph
    • 你呢張相失焦喎,背景咁清但個人濛晒嘅。
      你呢张相失焦㖞,背景咁清但个人蒙晒嘅。
      nei5 lei1 zoeng1 soeng2 sat1 ziu1 wo3, bui3 ging2 gam3 cing1 daan6 go3 jan4 mung4 saai3 ge3
      Your photo has lost focus, the background is so clear but the person is blurred
  2. 動詞
    引伸​指​中心​關注點​唔​清晰​,​活動​欠缺​主題​,​討論​話題​唔​得​集中
    figuratively, the centre of interest or activity is lost; without central issue; to lose focus in discussion
    • 你成日討論埋啲枝節問題,好易令主題失焦。
      你成日讨论埋啲枝节问题,好易令主题失焦。
      nei5 sing4 jat6 tou2 leon6 maai4 di1 zi1 zit3 man6 tai4, hou2 ji6 ling6 zyu2 tai4 sat1 ziu1
      You keep on discussing the minor problem, it would be easy to lose focus in the central issue.
Definitions (Wiktionary)
  1. verb
    to be out of focus
Examples (粵典–words.hk)
  1. Cantonese
    失焦
    失焦
    sat1 ziu1
    • to lose focus
  2. Cantonese
    你呢张相失焦㖞,背景咁清但个人蒙晒嘅。
    你呢張相失焦喎,背景咁清但個人濛晒嘅。
    nei5 lei1 zoeng1 soeng2 sat1 ziu1 wo3, bui3 ging2 gam3 cing1 daan6 go3 jan4 mung4 saai3 ge3
    • Your photo has lost focus, the background is so clear but the person is blurred
  3. Cantonese
    你成日讨论埋啲枝节问题,好易令主题失焦。
    你成日討論埋啲枝節問題,好易令主題失焦。
    nei5 sing4 jat6 tou2 leon6 maai4 di1 zi1 zit3 man6 tai4, hou2 ji6 ling6 zyu2 tai4 sat1 ziu1
    • You keep on discussing the minor problem, it would be easy to lose focus in the central issue.