Added 10 October 2026 heavy-duty adjective Categories: Describing WordsObscure Words adjective ! Definition from WordNet 3.1, Princeton University. More about heavy-duty at Wordnik → Where our words come from → Designed for heavy work. a heavy-duty detergent Related Words: heavyindustrialfraughthgvlorryheavyweightonerousfatweightyfar-reachingponderousburdensome Back to today's word