Industry
late Middle English (in industry (sense 2)): from French industrie or Latin industria ‘diligence’.
wiktionary
From Middle English industry, industrie, from Old French industrie, from Latin industria(“diligence, activity, industry”), from industrius(“diligent, active, zealous”), from Old Latin indostruus(“diligent, active”); origin unknown. Perhaps from indu(“in”) + ūst-, ūstr-, stem of ūrō(“burn, burn up, consume”, verb), related to Old High German ūstrī(“industry”), Old English andūstrian(“to hate, detest”, literally “to be consumed with zeal”).
etymonline
industry (n.)
late 15c., "cleverness, skill," from Old French industrie "activity; aptitude, experience" (14c.) or directly from Latin industria "diligence, activity, zeal," noun use of fem. of industrius "active, diligent," from early Latin indostruus "diligent," from indu "in, within" (from PIE *endo-, extended form of root *en "in") + stem of struere "to build" (from PIE root *stere- "to spread"). The meaning "habitual diligence, effort" is from 1530s; that of "systematic work" is from 1610s. The sense "a particular trade or manufacture" is first recorded 1560s.
