the fee paid for a prostitute's services, and so any gain a people or city is accused of earning by selling itself
This word names one specific kind of money: what changes hands when someone is paid for sex. Hebrew already had ordinary words for a worker's pay (שָׂכָר) and a thing's price (מְחִיר); this one carries the transaction inside it. A few uses spell it out as "the fee of a prostitute," but more often the word stands alone, because a Hebrew reader did not need the explanation.
The prophets seized on that. Once a nation's unfaithfulness to God could be pictured as prostitution, whatever the nation gained could be named its fee:
- Israel loved "a prostitute's fee on every threshing floor," meaning the grain harvest it credited to another god (Hosea 9:1)
- Samaria's images were gathered from such a fee and will go back to being one when they burn (Micah 1:7)
- Tyre's trade with every kingdom on earth is her fee, since she peddles herself to all comers (Isaiah 23:17)
Ezekiel runs the picture in reverse, and that reversal is his whole point. Jerusalem does not collect a fee; she pays one, showering gifts on her lovers to buy their attention. She is not even a competent prostitute, the accusation runs, because a prostitute at least gets paid.
One law sits behind all of this. Money earned this way could not be brought into God's house to settle a vow, however good the vow (Deuteronomy 23:18). The point is not only that such money is shameful but that it is unfit to touch holy things. Isaiah's oracle ends by overturning even that: Tyre's takings will one day be set apart for the LORD and go to feed those who serve him.