Having less light or a deeper shade of color; more obscure or sinister in nature.
From Old English deorc meaning 'dark, obscure,' related to Proto-Germanic derkaz. The comparative form follows standard English patterns of adding -er to form comparatives of adjectives.
Humans naturally associate darkness with danger due to our evolutionary history as diurnal creatures - our pupils dilate in low light, making everything literally appear darker and more threatening.
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