One who bates; someone who reduces, restrains, or in leather-making, applies the bating solution to hides.
From 'bate' plus the agent suffix '-er,' indicating a person who performs the action. Common in medieval craft terminology.
In old tanneries, the 'bater' was a specific job title—you were the person responsible for the smelly but crucial step of softening hides with special solutions, requiring both skill and a strong stomach.
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