陰空 [阴－]

Jyutping jam1 hung1
Pinyin yīn kōng

Definitions (Wiktionary)
  1. noun, Zhangzhou-Hokkien
    sewer; covered drain
    (syn.) 阴沟, 暗沟, 暗溝, 涵沟, 陰溝, 涵空, 涵溝