闇取引 backdoor trade●black market●black marketing●black-market dealings [deal]●black-market operation●black-market transactions●black-marketeering●illegal transaction●off-the-book dealing●off-the-books transaction●shady transaction●under-the-table deal●undercover dealing●undercover transaction●underground dealings●underground transaction

闇取引で売る〔~を〕 sell ~ on the black market

闇取引に近い 【形】gray

闇取引をする buy ~ on the black market●deal on a black market 【自動】black-marketeer

闇取引をする〔~を〕 sell ~ on the black market

闇取引をする人 black-marketeer

闇取引業者 black-market operator●bucket shop