"Lightless" is a word in ENGLISH

Destitute of light, or incapable of reflecting it; of the color of soot or coal; of the darkest or a …

That which is destitute of light or whiteness; the darkest color, or rather a destitution of all color; as, a …

Fig.: Dismal, gloomy, or forbidding, like darkness; destitute of moral light or goodness; atrociously wicked; cruel; mournful; calamitous; horrible.

Not having the faculty of discernment; destitute of intellectual light; unable or unwilling to understand or judge; as, authors are …

Destitute, or partially destitute, of light; not receiving, reflecting, or radiating light; wholly or partially black, or of some deep …

An imponderable substance or body; specifically, in the plural, a name formerly applied to heat, light, electricity, and magnetism, regarded …

madulúm - Dark, dim, dusk, dusky, obscure, destitute of light; concealed or shrouded in darkness, mysterious. (cf. dulúm).

Covered over, shaded, or darkened; destitute of light; imperfectly illuminated; dusky; dim.