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Jyutping mou6 kei4
Pinyin wù qí

Definitions (Wiktionary)
  1. verb, literary
    must; be sure to
    (syn.) 务必, 務須, 定著, 得, 務必, 必須, 非得, 著爱, 著愛, 必得, 务须, 必须

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Jyutping mou6 kei4
Pinyin wù qī

Definitions (CC-CEDICT)
  1. it is essential to (complete a project on time, be thorough etc)
Definitions (Wiktionary)
  1. verb, literary
    must; be sure to
    (syn.) 务必, 務須, 定著, 得, 務必, 必須, 非得, 著爱, 著愛, 必得, 务须, 必须