If you describe someone as industrious, you mean they work very hard. She was an industrious and willing worker. = hard-working + industriously in·dus·tri·ous·ly Maggie paints industriously all through the summer. someone who is industrious works hard = hard-working
Given to industry; characterized by diligence; constantly, regularly, or habitually occupied; busy; assiduous; not slothful or idle; commonly implying devotion to lawful and useful labor
Steadily and perseveringly active in a particular pursuit or aim; as, he was negligent in business, but industrious in pleasure; an industrious mischief maker