工業
こうぎょう · kougyou · JLPT N4 · noun
industry
🏭 工業 = craft/work (工) + business (業): the business of making things
工 is the character for craft or construction, as in 工場 (factory). 業 means business or trade, as in 産業 (industry) and 農業 (agriculture). Swap the first character to name the sector: 工業 is the making-things trade.