Unfair
Unfair , transitive verb
[1st pref. un- + fair.]
To deprive of fairness or beauty. [Rare] — Shakespeare
Unfair , adjective
[Anglo-Saxon unfager unlovely. See Un- not, and Fair, a.]
Not fair; not honest; not impartial; disingenuous; using or involving trick or artifice; dishonest; unjust; unequal.
You come, like an unfair merchant, to charge me with being in your debt.