ἀκάθαρτος

ἀκάθαρτος — akáthartos

ἀκάθαρτος, (καθαίρω) (from Sophocles down), in the Sept. equivalent to טָמֶא, not cleansed, unclean;

a. in a ceremonial sense, that which must be abstained from according to the levitical law, lest impurity be contracted: Act 10:14; Act 11:8 (of food); Act 10:28; 1Co 7:14 (of men); 2Co 6:17 (from Isa 52:11, of things pertaining to idolatry); Rev 18:2 (of birds),

b. in a moral sense, unclean in thought and life (frequent in Plato): Eph 5:5; τά ἀκάθαρτα τῆς πορνείας, Rev 17:4 (according to the true reading); πνεύματα, demons, bad angels (in twenty-three passages of the Gospels, Acts, and Revelation): Mat 10:1; Mat 12:43; Mar 1:23; Mar 1:26; Mar 3:11, etc.; Luk 4:33; Luk 4:36; Luk 6:18, etc.; Act 5:16; Act 8:7; Rev 16:13; Rev 18:2 (πνεύματα πονηρά in Mat 12:45; Luk 7:21; Luk 8:2; Luk 11:26; Acts 19:12f, 15f).