Added 9 October 2026 ill-use /ɪlˈjuːz/ verb Categories: Society verb ! Definition from Wiktionary (CC BY-SA). Pronunciation from Wiktionary, via Kaikki.org. More about ill-use at Wordnik → Where our words come from → To treat someone badly, cruelly or unkindly. noun Bad, cruel or unkind treatment. Related Words: ill-treatmaltreatmistreatabuseilltreatwrongmisusemalign Back to today's word