Lexical Definition

‎ἐγκρατής‎ enkratḗs (eng-krat-ace') self-controlled ^G:A
from ‎ἐν‎ and ‎κράτος‎

temperate.

• strong in a thing (masterful), i.e. (figuratively and reflexively) self-controlled (in appetite, etc.)

Abbott-Smith

** ἐγκρατής, -ές (< κράτος), [in LXX: Wi 8:20, Si 6:27 15:1 26:15 27:30, al. ;]

1. strong, powerful.
2. C. gen. rei, master of, hence,
3. (sc. ἑαυτοῦ), self -controlled, exercising self-control: Tit 1:8.†
SYN.: σώφρων (v. reff. s. ἐγκράτεια).

Abbott-Smith References

Liddell-Scott-Jones

ἐγκρατής-ής, ές,

(κράτος) in possession of power, [Refs 5th c.BC+]

__II holding fast, χεὶρ -εστάτη a hand with the firmest hold, [Refs 5th c.BC+]
__II.2 stout, strong, ἐ. σθένει [Refs 5th c.BC+]
__III with genitive of things, having possession of, χωρέων [Refs 5th c.BC+]; ναὸς ἐγκρατήςῆ πόδα the sheet that controls the ship, [Refs 5th c.BC+]; ἐ. αὑτῶν masters of themselves, [Refs 5th c.BC+]
__III.2 absolutely, master of oneself, self-controlled, [Refs 5th c.BC+]; self-disciplined, [Refs 4th c.BC+]
__IV adverb -τῶς, Ionic dialect - τέως [Refs 5th c.BC+]; with a strong hand, by force, ἄρχειν [Refs 5th c.BC+]; -τέως forcibly, [Refs 3rd c.BC+]
__IV.2 with self-control, temperately, ἐ. ἔχειν [Refs 5th c.BC+]