From a (as a negative particle) and dike; unjust; by extension wicked; by implication, treacherous; specially, heathen -- unjust, unrighteous.
see GREEK a
see GREEK dike
1. unjust (of God as judge): Romans 3:5; Hebrews 6:10.
2. of one who breaks God's laws, unrighteous, sinful (see ἀδικία, 2): (1 Corinthians 6:9); opposed to δίκαιος, Matthew 5:45; Acts 24:15; 1 Peter 3:18: opposed to εὐσεβής, 2 Peter 2:9; in this sense according to Jewish speech the Gentiles are called ἄδικοι, 1 Corinthians 6:1 (see ἁμαρτωλός, b. β.).
3. specifically, of one who deals fraudulently with others, Luke 18:11; who is false to a trust, Luke 16:10 (opposed to πιστός); deceitful, μαμωνᾶς, ibid. Luke 16:11 (for other interpretations see ἀδικία, 2 b.).