The craft or process of making boxes; the trade or industry involved in box manufacturing and construction.
Compound of 'box' and 'making' (from Old English 'macian'), which became a gerund ('-ing' form) describing the activity or industry as a whole.
Medieval boxmaking guilds had strict rules about wood quality and joinery techniques—you couldn't just nail wood together and call yourself a boxmaker, showing how craftsmanship was once legally defined.
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