Lit., the serpent, the old (serpent). For this habitual construction in John, see on 1Jo 4:9. For ἀρχαῖος old, see on 1Jo 2:7, and compare “he was a murderer ἀπ' ἀρχῆς from the beginning,” Joh 8:44; ἀρχή beginning being etymologically akin to ἀρχαῖος old.
The Devil
See on Mat 4:1.
Satan
See on Luk 10:18.
The deceiver (ὁ πλανῶν)
Lit., he that deceiveth. See on 1Jo 1:8.
World (οἰκουμένην)
See on Luk 2:1 The world with all its inhabitants.