Synonyms for unfair

modified

1. Unjust

   inequitable, wrongful, wrong, unrightful, low, base, injurious, unethical, not cricket*, bad, wicked, culpable, blamable, blameworthy, foul, illegal, improper, unsporting, shameful, cruel, shameless, dishonorable, unreasonable, discreditable, grievous, vicious, vile, undue, unlawful, petty, mean, unwarrantable, inexcusable, unjustifiable, iniquitous, immoral, criminal, forbidden, irregular.

   Antonyms fair*, proper, sporting.

2. Not in accord with approved trade practices

   unethical, criminal, proscribed, cheating, discriminatory, illegal, forbidden, tricky, evasive, shady, punishable, actionable, improper.