willful• Unfortunately, Tucson Water is an agency with an entrenched and willful bureaucracy.• He also proposes to toughen civil and criminal penalties for willful child labor violations.• a willful child• She can have tantrums like a willful child.• Even when a jury found willful conduct, that decision did not follow a murder trial.• A singular individual talent in a man's game and a distinctive, willful group of women in a team sport.• He dressed like a willful teenager, favoring jeans so tattered you could see his boxer shorts through them.• You give in to these willful tempers.