Plural of beltman; multiple workers, craftsmen, or personnel associated with belt-making or belt-wearing occupations or roles.
From 'beltman' plus the irregular plural '-men.' This is the traditional plural form of the masculine occupational noun.
The shift from 'beltmen' to more inclusive language shows how occupational titles embedded gender—today we'd say 'belt makers' or 'belt workers' to include everyone regardless of gender.
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