This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. An underground conduit, between vertical shafts, that leads water from the interior of a hill to villages in the valley

"The whole area was a kind of qanat system where man had helped nature in opening up the whole area to catastrophic collapse."

alluvion    self/other    viaduct    cutworm    vermis    teredo    flume    polder    gyration    unsettlement