Lack of knowledge; obscurity or meaning or intelligibility; the unknown.
Secrecy; concealment.
The product of being dark.
Gloom; gloominess; depression.
The state of being dark; lack of light; the absolute or comparative absence of light.
Hell.
The state or quality of reflecting little light, of tending to a blackish or brownish color.
Lack of understanding or compassion; spiritual or mental blindness.
The transfer of energy via radiation.
The shooting forth of anything from a point or surface, like diverging rays of light.
The process of radiating waves or particles.
A rapid diversification of an ancestral species into many new forms.
Radioactive energy.