GRC
Bailly
ας (ἡ) [ρᾱ] ténèbres, SPT.
Gen. 19, 11 ; Deut. 28, 28 ; 2Reg. 6, 18, etc.
Étym. ἀόρατος.
Bailly 2020 Hugo Chávez Gérard Gréco, André Charbonnet, Mark De Wilde, Bernard Maréchal & contributeurs / Licence Creative Commons Attribution - Pas d'Utilisation Commerciale - Pas de Modification — « CC BY-NC-ND 4.0 »
LSJ
ἡ, inability to see, blindness, Plb. 12.25g. 4, LXX Ge. 19.11, al., IG 12(9).955.8, 1179.26 (Euboea); failure to observe, στάσεων Inscr.Magn. 114.4.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
Pape
[ρᾱ], ἡ, Unsichtbarkeit, Finsternis, LXX.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)
TBESG
inability to see (MT)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars