Dictionary entry

συνεῖδον

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

** συν-εῖδον irreg. aor. of συνοράω (v.s. εἶδον),

[in LXX: I Mac 4:21א, II Mac 2:24 4:4, 41 R 5:17 7:4, 20 8:8, III Mac 2:8 A *;]

1. to see together or at the same time (Arist., Xen.).

2. to see in one view, hence, of mental vision, to comprehend, understand (LXX, Polyb., Plut., al.): Ac 12:1214:6 (on the related σύνοιδα, v. s.v.).†