Abbott-Smith Manual Greek Lexicon
εὐθύτης (G2118)
1 εὐθύτης , -ητος, ἡ ( εὐθύς ), [in LXX chiefly for יֹשֶׁר , מִישׁוֹר and cognate forms ;] uprightness : He 1:8 (LXX) .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain