dark

adjective:having little or no light; not illuminated
- The room was so dark that I could barely see the door.
adjective:having a deep or intense color, especially black, brown, or blue
- She has dark hair that shines in the sunlight.
adjective:lacking knowledge, understanding, or awareness; ignorant
- He was still in the dark about the company's new policy.
adjective:morally evil, sinister, or unpleasant
- The novel explores dark themes of betrayal and revenge.
adjective:somber, gloomy, or depressed in mood
- After the loss, she felt a dark cloud hanging over her thoughts.
adjective:occurring late in the evening or at night
- They went for a walk in the dark, guided only by streetlights.
noun:the absence of light; darkness
- The dark settled over the valley as the sun set.
noun:nightfall; the end of the day
- We need to get home before dark.
verb:to make or become dark; to obscure with shadow or lack of light
- Heavy clouds began to darken the sky before the storm.