Definition

Not producing or using heat.

Example

The heatless light bulbs are more energy-efficient than traditional ones.

Conversation

I just bought a new heatless curling set for my hair.

Oh really? How does that work?

It uses a special technique to curl without any heat damage.

That sounds awesome! I need to try something like that.

Synonyms & Antonyms

Root Explanation

Heatless → It is formed from "heat" (from Old English "hætu", meaning warmth or hotness) and "-less" (meaning without). The word "heatless" means without heat or warmth.

Memory Tip

Think of being 'without' ('-less') warmth ('heat') — that's why heatless means lacking heat.

Visually Confused Words