Ἀπολλύων (Apollýōnap-ol-loo'-ohnproper noun|personApollyon)
[Grk] Ἀπολλύων LN: 93.32 GK: G661
Derivation: active participle of ἀπόλλυμι;
Strong's: a destroyer (i.e. Satan)
KJV: --Apollyon.
See: ἀπόλλυμι