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Jyutping maan6 bat1 dak1 ji5
Pinyin wàn bù dé yǐ

Definitions (CC-CEDICT)
  1. only when absolutely essential (idiom); as a last resort
Definitions (Wiktionary)
  1. adv
    out of absolute necessity; with no other choice; as a last resort
    • 不是萬不得已
      不是万不得已
      bù shì wàn bù dé yǐ
      If we'd had any other choice, ...
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Wiktionary)
  1. Mandarin
    万不得已
    萬不得已
    wàn bù dé yǐ
    • out of absolute necessity; with no other choice
  2. Mandarin
    不是万不得已
    不是萬不得已
    bù shì wàn bù dé yǐ
    • If we'd had any other choice, ...