An Aramaic loanword found only in Ezra, referring to an excise tax or tribute payment. Part of the triad: mindah, b'lo, halak.
Though technical, b'lo's significance lies in exile/return context. Artaxerxes exempted priests from b'lo (Ezra 7:24), enabling temple worship. God's sovereignty extends over tax codes of empires β He uses human administrative machinery for redemptive purposes.