黑燈瞎火 (hak1 dang1 hat6 fo2) — in complete darkness in Cantonese
hakˉ¹黑dangˉ¹燈hatˍ₆瞎foˊ²火简 黑灯瞎火
Mandarin Pinyin: hei1 deng1 xia1 huo3
Meaning of 黑燈瞎火
nounin complete darkness
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