One who spends or distributes resources in advance; a steward or advance supplier.
From 'fore-' + 'spenser' (from 'spend' + '-er,' where 'spenser' is an archaic term for a steward or larder-keeper). Rare and largely obsolete by modern English.
This is pure Medieval English—a forespencer was literally the person responsible for distributing food and supplies before feasts or journeys. It's a job title that completely disappeared when supply chains got boring.
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