G5406 φονεύς (phoneús)

KJV renderings: murderer
Strong's definition: a murderer (always of criminal (or at least intentional) homicide; which G443 (ἀνθρωποκτόνος) does not necessarily imply; while G4607 (σικάριος) is a special term for a public bandit)
Derivation: from G5408 (φόνος);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.