unjust

not fair; marked by injustice or partiality or deception

• “used unfair methods”
• “it was an unfair trial”
• “took an unfair advantage”

violating principles of justice

• “unjust punishment”
• “an unjust judge”
• “an unjust accusation”

not equitable or fair

• “the inequitable division of wealth”
• “inequitable taxation”

not righteous

• “unjust”
• “unrighteous”