🇬🇧🇪🇸 radioactive - radioactivo : English Lesson

Meaning of "radioactive" ("radioactivo"), detailed definition, and a short video lesson below.

"Radioactive" is an adjective used to describe a substance that emits radiation, which is a form of energy that can be harmful to living organisms. This radiation is produced by the decay of atomic nuclei and can be used in various applications, such as medical treatments and energy production, but it requires careful handling due to its potential dangers.

Watch and listen to this English flashcard to understand the word in more detail, with an easy example sentence.

His radioactive socks kept his feet warm and glowing.

I left my sandwich in my locker for a month, and now it looks so weird it might be radioactive.

My mom says my bedroom is a disaster, but I say it’s just a radioactive science experiment.

If I ever find a radioactive spider, I’m totally letting it bite me just in case I get superpowers.

The cafeteria mystery meat glowed under the light… definitely radioactive.

In the garden a child found a small, radioactive stone that pulsed with radioactive green light. The child watched a plant wilt when the radioactive glow touched its leaves. Even the dog’s radioactive fur stood on end near the radioactive stone. The child wrapped it in cloth, sealed it in a box, and called for help, relieved.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.