Lexicon :: Strong's G4894 - synoraō

συνεῖδον, participle συνιδών; perfect σύνοιδα, participle feminine genitive συνειδυίας (Acts 5:2 R G, συνειδης L T Tr WH; cf. Buttmann, 12 (11); (Tdf.; Proleg., p. 117; WHs Appendix, p. 156)); (see εἰδῶ); from Herodotus down;
1. to see (have seen) together with others.
2. to see (have seen) in one's mind, with oneself (cf. Fritzsche, Commentary on Romans, vol. i., p. 120; on Mark, pp. 36 and 78; (see σύν, II. 1 and 4)), i. e. to understand, perceive, comprehend: συνιδών, when he had understood it, Acts 12:12 (A. V. considered); Acts 14:6 (became aware) (2 Macc. 4:41; 2Macc. 14:26, 30; 3Macc. 5:50; Polybius 1,4, 6; 3, 8, 9; etc.; Josephus, Antiquities 7, 15, 1; b. j. 4, 5,4; Plutarch, Themistius, 7).
Perfect σύνοιδα (cf. σύν, as above)
1. to know with another, be privy to (so A. V.): Acts 5:2.
2. to know in one's mind or with oneself; to be conscious of: τί ἐμαυτῷ, 1 Corinthians 4:4 (R. V. know nothing against myself (cf. Wright, Bible Word-Book, 2nd edition, under the word 'By')) (τήν ἀδικίαν, Josephus, Antiquities 1, 1, 4; examples from Greek writings are given by Passow, under the word σύνοιδα, a.; (Liddell and Scott, under the word σύνοιδα, 2); followed by ὅτι (Dionysius Halicarnassus 2:995, 9); the Epistle of Barnabas 1 (4) 3).

BLB Scripture Index of Thayer's