From adikos; (legal) injustice (properly, the quality, by implication, the act); morally, wrongfulness (of character, life or act) -- iniquity, unjust, unrighteousness, wrong.
see GREEK adikos
2. unrighteousness of heart and life;
a. universally: Matthew 23:25 Griesbach; Acts 8:23 (see σύνδεσμος); Romans 1:18, 29; Romans 2:8; Romans 6:13; 2 Timothy 2:19; opposed to ἡ ἀλήθεια, 1 Corinthians 13:6; 2 Thessalonians 2:12; opposed to ἡ δικαιοσύνη, Romans 3:5; Hebrews 1:9 Tdf.; owing to the context, the guilt of unrighteousness, 1 John 1:9; ἀπάτη τῆς ἀδικίας deceit which unrighteousness uses, 2 Thessalonians 2:10; μισθός ἀδικίας reward (i. e., penalty) due to unrighteousness, 2 Peter 2:13 (see ἀδικέω, 2 b. at the end).
b. specifically, unrighteousness by which others are deceived: John 7:18 (opposed to ἀληθής); μαμωνᾶς τῆς ἀδικίας deceitful riches, Luke 16:9 (cf. ἀπάτη τοῦ πλούτου, Matthew 13:22; others think 'riches wrongly acquired'; (others, riches apt to be used unrighteously; cf. Matthew 13:8 and Meyer at the passage)); κόσμος τῆς ἀδικίας, a phrase having reference to sins of the tongue, James 3:6 (cf. κόσμος, James 3:8); treachery, Luke 16:8 (οἰκονόμος τῆς ἀδικίας (others take it generally, 'acting unrighteously')).
3. a deed violating law and justice, act of unrighteousness: πᾶσα ἀδικία ἁμαρτία ἐστι, 1 John 5:17; ἐργάται τῆς ἀδικίας, Luke 13:27 αἱ ἀδικίαι iniquities, misdeeds, Hebrews 8:12 (from the Sept. Jeremiah 38:34 (