Added 9 October 2026 willful adjective Categories: Describing WordsRare Words adjective ! Definition from Wiktionary (CC BY-SA). More about willful at Wordnik → Where our words come from → American standard spelling of wilful. Related Words: self-willedheadstrongvoluntaryfrowarddisobedientwilfulintentionaldeliberateintendedknowingobstinatestubborn Back to today's word