in·iq·ui·ty 
(ĭ-nĭkwĭ-tē)
(ĭ-nĭkwĭ-tē)n. pl. in·iq·ui·ties
1. Gross immorality or injustice; wickedness.
2. A grossly immoral act; a sin.
[Middle English iniquite, from Old French, from Latin inīquitās, from inīquus, unjust, harmful : in-, not; see IN-1 + aequus, equal.]