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Jyutping lau4 seoi2 bat1 fu6
Pinyin liú shuǐ bù fǔ

Definitions (CC-CEDICT)
  1. flowing water does not rot
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    Things in frequent use are not easily eroded, and can remain energetic.
  2. phrase, idiomatic
    Flowing water is never stale
  3. phrase, figuratively, idiomatic
    A rolling stone gathers no moss
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    流水不腐,户枢不蛀。
    流水不腐,户樞不蛀。
    liú shuǐ bù fǔ , hù shū bù zhù 。
    • Too much rest is rust.