IPA: /tɛnˈɛbriəs/
KK: /tɛnˈɛbriəs/
Having a dark, shadowy, or gloomy quality; often used to describe places or atmospheres that are dim or obscure.
The tenebrious forest was filled with shadows and an eerie silence.
Tenebrious → It is formed from "tenebrae" (meaning darkness) and the suffix "-ous" (meaning full of). The word "tenebrious" means full of darkness or shadowy.
Think of 'tenebrae' which means darkness, and remember that 'tenebrious' describes something that is full of darkness.