貽害無窮 [贻－无穷]

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Pinyin yí hài wú qióng

Definitions (CC-CEDICT)
  1. to have disastrous consequences
Examples (Wiktionary)
  1. Mandarin
    贻害无穷
    貽害無窮
    yí hài wú qióng
    • to leave behind endless troubles