Exorkizo means to adjure — to put someone under a solemn oath or command in the name of a higher power. In Matthew 26:63 the high priest adjures Jesus: 'I adjure [exorkizo] you by the living God, tell us if you are the Christ.' This is the formal legal procedure for compelling testimony under oath before God. The word is related to horkos (oath) and exorkistes (exorcist).
The high priest's use of exorkizo at Jesus's trial is deeply ironic. He invokes the divine name to compel the very God incarnate to testify. Jesus answers truthfully — and His answer is taken as blasphemy. The God before whom all oaths are sworn is placed under oath by His creature. This inversion of authority reveals the nature of human rebellion: we wish to place God in the dock. Yet Jesus does not refuse. His response — 'You have said so. But I tell you, from now on you will see the Son of Man seated at the right hand of Power' — is the ultimate reversal.