VENT
Source: 566, 567
vent. Vent, n. a hole, opening, passage, discharge, sale
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Vent (vĕnt), n. [[F. vente, fr. L. vendere, -itum, to sell; perh. confused with E. vent an opening. See Vend.]] Sale; opportunity to sell; market. Shelton. There is no vent for any commodity but of wool. Sir W. Temple.