köken: From Old Galician-Portuguese tẽevras, from Latin tenebrās (“darkness”) accusative plural of tenebra. Compare Galician tebras, Spanish tinieblas, French ténèbres, Italian tenebre.
1628-1691, João Ferreira de Almeida, A Bíblia Sagrada, Gênesis, Capitulo 1
köken: From Old Norse myrkr n, from Proto-Germanic *mirkwiz, cognate with Norwegian Nynorsk mørker and Swedish mörker. Derived from the adjective Proto-Germanic *merkuz, see Danish mørk.