εἰρήνη (eirḗnēi-ray'-naynounpeace)
[Grk] εἰρήνη LN: 22.42, 25.248 GK: G1645 Hebrew: בֶּטַח, הָלַךְ, לֶקַח, צַח, שַׁלְוָה, שָׁלֹום, שָׁקַט
Derivation: probably from a primary verb εἴρω (to join);
Strong's: peace (literally or figuratively); by implication, prosperity
KJV: --one, peace, quietness, rest, + set at one again.