Strong's Greek Concordance

G3364: οὐ μή

ou mḗ · “never”

Definition

a double negative strengthening the denial; not at all

KJV translates it as: any more, at all, by any (no) means, neither, never, no (at all), in no case (wise), nor ever, not (at all, in any wise)

Word origin: i.e. G3756 (οὐ) and G3361 (μή);

Extended definition

never, not ever, a double negative strengthening the denial; not at all, surely not

Abbott-Smith Manual Greek Lexicon (1922) via STEPBible TBESG (CC BY 4.0).