Dumb vs Stupid

When to use each in English, with meaning, register, and examples.

	Dumb	Stupid
Meaning	Not smart or unable to think clearly.	Not smart or showing a lack of intelligence.
Register	informal	informal
CEFR level	C1	A2
Part of speech	adjective	adjective
Usage notes	Often used informally to describe someone as not intelligent. Be cautious; using 'dumb' in a derogatory way can be offensive. Consider using 'unintelligent' in formal contexts.	Use 'stupid' to describe a behavior or action, but be cautious in formal settings as it can come off as rude or offensive.

Frequently asked questions: Dumb vs Stupid

What's the difference between "Dumb" and "Stupid"?

"Dumb" means: Not smart or unable to think clearly. "Stupid" means: Not smart or showing a lack of intelligence.

When should I use "Dumb" and "Stupid"?

"Dumb" is informal; "Stupid" is informal.

Are "Dumb" and "Stupid" the same CEFR level?

"Dumb" is at C1, "Stupid" is at A2 on the CEFR scale.