dum in English:

He's stupid.

Pitching camp on sand banks that go under at high tide is a truly stupid thing to do.

A stupid man's report of what a clever man says is never accurate, because he unconsciously translates what he hears into something that he can understand.

Yea... Dima continued, talking mostly to himself. "It's as if the author of my story got into some stupid argument, retired to Fiji, and just left me here to rot."

They're stupid children, what a nuisance, she said. I replied praising them: "What are you saying, They're both smart, with a good memory and a promising future"

When I tried to speak to her, I always found myself too shy to do more than stammer or say something stupid.

I was assailed by the stupid, but unshakeable, idea that if I was imprudent enough to move my hand I'd be noticed.

This is probably a stupid question, but which is stronger, the tiger or the lion?

It must bother you to have taken a bad master. "I'm stupid too. So, it's all right."

This is a golden opportunity we'd be stupid to pass up. Let's get to work and finish it all in one fell swoop.

The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.

she told him to stop messing about with his stupid painting. I was stupid enough to think she was perfect. You’re not a coward, stupid!

Probably just a stupid urban legend "But they do say 'there's no smoke without fire', don't they?"

Are people born intelligent or stupid, or is intelligence the result of how you live?

The people all praised the emperor's clothes without telling him the truth so as not to seem stupid, until a little boy said, "The emperor is naked!"

Don't be silly!

Even the cleverest students can make silly mistakes.

Ikeda made several silly mistakes, and so he was told off by the department head.

The meeting was going off without a hitch until he threw a wet blanket on it by making silly remarks.

Bob thinks it is a silly idea to call his mother who is so far away, to spend so much, and to say so little.

It may never be known how we silly Anglophones got "baloney" out of "bologna."

His parents' view was that he was wasting his earnings on a silly girl.

Read, every day, something no one else is reading. Think, every day, something no one else is thinking. Do, every day, something no one else would be silly enough to do. It is bad for the mind to be always part of unanimity.

If my kid couldn't speak Shanghainese, I’d slap him silly. the man said.

This may be a silly question, but which is stronger - a tiger or a lion?

Sentences bring context to the words. Sentences have personalities. They can be funny, smart, silly, insightful, touching, hurtful.

What a silly question! That was a silly thing to do, wasn’t it? Don’t be silly – it’s only a spider. She makes a fuss about such silly little (= unimportant) things.

It is a silly practice for non-Christians to send chocolates on St. Valentine's Day.

All that's left for me is to drink myself silly with vodka and to get lost in sleep.