ultraviolet
Upper-Intermediate (B2)
IPA: /ˌʌltrəˈvaɪəlɪt/
KK: /ˌʌltrəˈvaɪəlɪt/
adjective
Definition
Relating to a type of light that is not visible to the human eye and has shorter wavelengths than violet light.
Example
Ultraviolet light can cause sunburn and skin damage.
Conversation
Have you heard about the new ultraviolet lamps they’re selling?
Yeah, I read that they can help kill germs and bacteria.
That sounds really useful, especially for keeping the house clean.
Definitely! I might get one for my room to help with allergies.
Synonyms & Antonyms
Synonyms
invisible
radiant
spectral
Antonyms
visible
infrared
opaque
noun
Definition
A type of light that is not visible to the human eye and has a shorter wavelength than visible light, often associated with sunburn and used in various technologies.
Example
Ultraviolet rays from the sun can cause skin damage if you are not protected.
Conversation
Did you know that ultraviolet light can be harmful to your skin?
Yeah, I heard that it's important to wear sunscreen.
Exactly! I always make sure to apply it when I'm outside.
Root Explanation
Ultraviolet → It is formed from "ultra-" (meaning beyond) and "violet" (from Latin "viola", meaning the color violet). The word "ultraviolet" refers to light that is beyond the visible spectrum of violet light.
Memory Tip
Think of 'beyond' ('ultra-') the color 'violet' — that's what ultraviolet means, light that is beyond what we can see.
Visually Confused Words
extraviolet