dumb

dumb — adjective

1. lacking good sense or sound judgment, often used in informal speech to criticize

1.adjectiveA2
Definition

lacking good sense or sound judgment, often used in informal speech to criticize someone's action, idea, or general intelligence.

Example

Bilal made a dumb joke at dinner, and nobody laughed at all.

collocation: dumb joke

Sumin felt really dumb after giving the wrong answer to such an easy question.

pattern: feel + adj + after [event]

Common collocations
  • dumb idea
  • dumb question
  • dumb luck
  • dumb decision
  • dumb move
  • feel dumb
  • make a dumb mistake
Synonyms
  • stupid

    more direct; can be just as harsh but is more standard across registers

  • foolish

    milder; focuses on poor judgment in a situation rather than low intelligence

  • silly

    gentlest of the group; often playful or about trivial matters

  • dense

    informal; describes someone slow to understand rather than actively unintelligent

Antonyms
  • smart

    having good judgment and quick understanding

  • clever

    able to solve problems in an original way

  • bright

    naturally intelligent; often used for children

Grammar Patterns

dumb + noun

feel dumb

too dumb to + infinitive

Usage Note

Very common in informal spoken English but strongly avoided in formal or academic writing. When criticizing a specific action rather than a person's general intelligence, 'foolish' or 'unwise' are politer alternatives.

Common Mistakes

The professor called my essay dumb.' — unlikely in academic contexts.
The professor said my essay showed weak reasoning.
use academic register in formal settings.
He is too dumb to learn English' (overly harsh).
He finds English challenging.
'dumb' is a strong insult; use with care.

2. physically unable to produce speech, either from birth or as a result of illness

2.adjectiveB2
Definition

physically unable to produce speech, either from birth or as a result of illness or injury.

Example

A rare illness left Nadia completely dumb when she was a toddler.

passive: was left + adjective

The doctor explained that the patient was not deaf — he was simply dumb.

contrastive structure: not X — was Y

Common collocations
  • born dumb
  • left dumb
  • deaf and dumb (dated)
Synonyms
  • mute

    clinical, neutral term preferred in medical contexts

  • nonverbal

    educational context; broader, includes inability to use any language form

  • speechless

    temporary, emotional cause — not physical inability

Antonyms

Grammar Patterns

dumb + with + [emotion noun (rare: physical inability)]

be born dumb

be left dumb

Usage Note

This sense is increasingly considered outdated or insensitive when referring to a person. The preferred modern terms are 'mute' (in clinical contexts) or 'nonverbal' (in educational settings). Learners should avoid using 'dumb' to describe someone's physical inability to speak in most everyday situations.

Common Mistakes

She is deaf and dumb.
She is deaf and nonverbal.
The phrase 'deaf and dumb' is outdated and offensive; use specific terms instead.

3. finding yourself lost for words for a short while because a powerful feeling suc

3.adjectiveB1
Definition

finding yourself lost for words for a short while because a powerful feeling such as shock, surprise, or fear has taken over.

Example

Henrik was struck dumb with shock when he heard that his sister had won the lottery.

fixed phrase: struck dumb + with + [emotion]

The audience sat dumb with amazement after the magician made the elephant vanish.

pattern: sit/stand dumb with [emotion]

Common collocations
  • struck dumb
  • dumb with shock
  • dumb with amazement
  • dumb with fear
  • leave someone dumb
Synonyms
  • speechless

    far more common in modern English for temporary inability to speak

  • stunned

    emphasizes the cause — shock or amazement — not just the effect

  • tongue-tied

    informal; usually from shyness or nervousness rather than shock

Antonyms

Grammar Patterns

be + dumb + with + [emotion]

struck + dumb + by/with + [emotion]

Usage Note

Frequently appears in the fixed expression 'struck dumb' and is almost always followed by 'with' plus a cause noun (shock, amazement, fear, surprise). This sense rarely describes mere quietness — it always implies an external cause that robs you of words.

Common Mistakes

I was dumb for ten minutes because I had nothing to say.
I was quiet for ten minutes because I had nothing to say.
'dumb' in this sense requires an emotion strong enough to prevent speech, not just silence.

4. referring to a piece of electronic equipment that has no internet access and can

4.adjectiveC1
Definition

referring to a piece of electronic equipment that has no internet access and cannot process data independently — the opposite of a 'smart' model.

Example

A dumb TV cannot run streaming apps or connect to the internet on its own.

contrast: dumb TV vs smart TV

The company still sells a dumb version of the phone with no touchscreen.

collocation: dumb version

Common collocations
  • dumb phone
  • dumb terminal
  • dumb device
  • dumb TV
  • dumb keyboard
  • dumb switch
Synonyms
  • basic

    neutral term; describes minimal features without implying lack of intelligence

  • non-smart

    clearer, avoids the potentially offensive overtone of 'dumb'

  • offline

    specific to internet connectivity — not the same as lacking independent processing

Antonyms
  • smart

    able to connect and process data independently

  • intelligent

    high-end industry term for devices with AI capabilities

  • connected

    specifically about internet connectivity

Grammar Patterns

dumb + [device noun]

dumb + [technology noun]

Usage Note

Only used for electronic devices and technology — the direct opposite of 'smart' in product categories. Common in phrases like 'dumb phone' (a basic mobile phone with no internet) and 'dumb terminal' (a computer monitor with no processing power).

Common Mistakes

My old car is a dumb car' (confusing 'non-smart' with 'not modern').
My old car is a basic model with no smart features.
'dumb' for devices is mainly used in computing and electronics, not for all machinery.

dumb — verb

Word family

  • dumbly
    adverbC1
  • dumbness
    nounC1
  • dumbbell
    nounA2
  • dumbfound
    verbC1
  • dumbfounded
    adjectiveB2
  • dumb down
    phrasal verbC1

Synonym discussion

Sense: adjective/1

All four words describe a lack of good judgment or intelligence, but they differ sharply in harshness and context. 'Dumb' is strongly informal and critical — calling a person 'dumb' suggests they lack basic mental ability, making it one of the harshest everyday insults in American English. 'Stupid' is more neutral and direct; it can describe a person's general intelligence or a single regrettable action, and it appears in both spoken and written registers. 'Foolish' is milder — it focuses on poor judgment in a specific situation rather than a person's overall ability ('It was foolish to lend him money'). 'Silly' is the gentlest of the group, often carrying a tone of playfulness or triviality ('a silly mistake,' 'a silly hat'). A useful rule of thumb: the harsher the word, the more offensive it becomes when applied to a person directly instead of to their action.

dumb ↗stupid ↗foolish ↗silly ↗

Common collocations

Nouns

  • dumb luck (adj/1)
  • dumb question (adj/1)
  • dumb idea (adj/1)
  • dumb mistake (adj/1)
  • dumb phone (adj/4)
  • dumb terminal (adj/4)

Adverbs

  • completely dumb (adj/3)
  • struck dumb (adj/3)
  • really dumb (adj/1)
  • absolutely dumb (adj/1)
  • so dumb (adj/1)

Phrases

  • dumb down
  • play dumb
  • deaf and dumb (dated)
  • dumb as a rock (informal)

Prepositions

  • dumb with (adj/3)
  • dumb from (adj/2 — rare)
  • dumb about (adj/1 — informal)

Etymology

Old EnglishMiddle EnglishModern English

From Old English 'dumb' meaning 'silent, unable to speak.' It is related to Old High German 'tumb' (silent, stupid) and Old Norse 'dumbr' (mute). The meaning 'stupid' emerged in Middle English, arising from the incorrect assumption that a person who could not speak must lack intelligence. The modern technological sense (non-smart device) is a late 20th-century extension of the 'lacking intelligence' meaning, coined as the opposite of 'smart' in computing.