🇬🇧🇪🇸 dubious - dudoso : English Lesson

Meaning of "dubious" ("dudoso"), detailed definition, and a short video lesson below.

Dubious describes something that you are not sure about, or that seems a little bit suspicious and maybe not trustworthy. If someone tells you they can fly to the moon on a unicorn, you might feel dubious about their claim because it seems unlikely!

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

Mom was dubious when I said the spaghetti exploded by itself.

He looked dubious when I told him llamas could sing opera.

My teacher looked dubious when I said aliens ate my homework.

I’m always dubious when my little sister says, “Trust me!”

I felt dubious when my robot promised to clean my room… with ketchup.

He found a dubious box on the step. The cat gave a dubious stare and tapped the lid. The old woman waved a dubious hand and warned him. He opened it; a dubious light spilled out and a small bird flew free. He laughed, less dubious now, and carried the bird inside.

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.