Definition

Not having any light; completely dark or unlit.

Example

The cave was lightless, making it difficult to see anything inside.

Conversation

Have you ever been in a completely lightless room?

Yeah, it can feel really eerie sometimes.

I find it hard to relax when it's that lightless.

Same here! I prefer a little dim light to feel cozy.

Synonyms & Antonyms

Root Explanation

Lightless → It is formed from "light" (from Old English *leoht*, meaning not heavy or bright) and "-less" (meaning without). The word "lightless" means without light or brightness.

Memory Tip

Think of being 'without' ('-less') 'light' — that's why lightless means lacking light.

Visually Confused Words