G4998 σώφρων (sṓphrōn)

KJV renderings: discreet, sober, temperate
Strong's definition: safe (sound) in mind, i.e. self-controlled (moderate as to opinion or passion)
Derivation: from the base of G4982 (σώζω) and that of G5424 (φρήν);

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