1. knowing along with another, conscious , ὡς θεοὶ ξυνίστορες as the gods are witnesses , (Sophocles Tragicus), etc. 2. with accusative (with the verbal construction), πολλὰ συνίστορα κακά conscious of many evils, (Aeschulus Tragicus) (ML)
STRONG'S WORD STUDY
G9327 — συνίστωρ
sunistōr · a joint witness · Greek