Strong's G4998 — σώφρων (adjective)
sophron (so'-frone) adj.
1. safe (sound) in mind, i.e. self-controlled (moderate as to opinion or passion)
[from the base of G4982 and that of G5424]
KJV: discreet, sober, temperate 
Root(s): G4982, G5424 
Hebrew root: φρήν
Occurrences: 4