Lexical Definition

‎νηφάλεος‎ nēpháleos (nay-fal'-eh-os) sober ^G:A
from ‎νήφω‎

sober.

• sober, i.e. (figuratively) circumspect

Abbott-Smith

* νηφάλιος (-λεος, Rec., in I Ti 3:2, 11), -ον (in cl., -α, -ον), (< νήφω),
1. in cl., of drink, not mixed with wine.
2. In later writers (Plut., al.), of persons, sober, temperate: I Ti 3:2, 11, Tit 2:2.†

Abbott-Smith References

Liddell-Scott-Jones

νηφαλέος-έος, α, ον,

={νηφάλιος}, Hdn.Gr. 2.908, +others; ={σώφρων}, [Refs 8th c.BC+] adverb -έως sanely, ξυντελέσαι δόμον [Refs 2nd c.AD+]