Dictionary entry

σκοτεινός

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament with Strong's

σκοτεινός (WH. -τινός), -ή, -όν

(< σκότος), [in LXX chiefly for חֹשֶׁךְ and cogn. forms;]

dark: opp. to φωτεινός, Mt 6:23, Lk 11:34, 36.†