Tenebrific

• (a.) Rendering dark or gloomy; tenebrous; gloomy.
Found on http://thinkexist.com/dictionary/meaning/tenebrific/

Tenebrific

Ten`e·brif'ic adjective [ Latin tenebrae darkness + facere to make.] Rendering dark or gloomy; tenebrous; gloomy. « It lightens, it brightens, The tenebrific scene.» Burns. « Where light Lay fitful in a tenebrific time.» R. Browning.
Found on http://www.encyclo.co.uk/webster/T/25

tenebrific

producing darkness
Found on http://phrontistery.info/t.html
No exact match found