Unequal (adjective)

1. Not equal in size, amount, or value.
2. Inequitable or unjust.

Origin:

From the latin word inaequalis, from in- "not" + aequalis "equal".

Examples:

1. The distribution of wealth is unequal.
2. The game was not played on an equal footing.
3. The punishment is unequal to the crime.
4. The work was divided among the team members, but it was not an equal division.
5. The treatment of employees is unequal and unfair.