Definitions

weak

[week] / wik /

ADJECTIVE

not strong

Synonyms

STRONGEST

anemic feeble fragile frail hesitant powerless shaky sickly sluggish uncertain unsteady weakened wobbly

WEAK

debilitated decrepit delicate effete enervated epicene exhausted faint flaccid flimsy forceless impuissant infirm insubstantial irresolute lackadaisical languid languorous limp makeshift out of gas prostrate puny rickety rocky rotten senile spent spindly supine torpid undependable unsound unsubstantial wasted wavering weakly

Antonyms

STRONGEST

healthy hearty powerful stable strong unbreakable

WEAK

capable fit potent

ADJECTIVE

cowardly

Synonyms

STRONGEST

hesitant indecisive ineffectual insecure nervous powerless shaky soft uncertain unstable wobbly

WEAK

faint-hearted fluctuant frightened impotent infirm irresolute nerveless spineless timorous undependable unreliable unsure vacillating wavering weak-kneed wimpy wishy-washy zero

Antonyms

WEAK

bold brave confident

ADJECTIVE

faint, soft

Synonyms

STRONGEST

dull feeble low poor quiet small thin

WEAK

bated dim distant gentle imperceptible inaudible indistinct muffled pale reedy slight stifled unaccented unstressed whispered

Antonyms

WEAK

loud noisy

ADJECTIVE

deficient, feeble

Synonyms

STRONGEST

immature inadequate incomplete ineffective ineffectual inept lacking limited poor shaky slim small thin

WEAK

faulty flabby flimsy forceless green hollow implausible impotent improbable incompetent inconceivable inconclusive incredible invalid pathetic raw shallow slight spineless substandard thick unbelievable unconvincing unprepared unqualified unsatisfactory unsubstantial unsure untrained wanting

Antonyms

STRONGEST

able adequate competent enough strong sufficient

WEAK

capable fit potent

ADJECTIVE

exposed, vulnerable

Synonyms

WEAK

accessible assailable defenseless helpless indefensible unguarded unprotected unsafe untenable wide-open woundable

Antonyms

WEAK

able fit guarded potent protected safe secure

ADJECTIVE

watered-down

Synonyms

STRONGEST

thin

WEAK

dilute diluted insipid milk-and-water runny tasteless washy waterish watery wishy-washy

Antonyms

WEAK

concentrated potent strong thick

Frequently Asked Questions

What is another word for weak?

Weak means not strong. A synonym for weak in the context of physical strength is feeble. A person might also be considered weak as in cowardly or easily defeated. Something that can easily break can be described as fragile or delicate. When a sick or very tired person says they feel weak, it means they have no energy. A person who’s very ill and generally weak in this way might be described as frail. When weak means lacking in force, effectiveness, or support, synonyms are ineffectual and poor, as in That’s a weak/poor excuse. In the context of sounds, weak is used to mean faint, soft, and quiet. A weak sound might be one that’s indistinct, thin, or muffled. A very informal slang term that can mean the same thing as weak is weak sauce. To become weak is to weaken. A specific way of being weak is a weakness. Other terms for this are weak point, vulnerability, and soft spot. These terms often suggest a flaw that can allow someone or something to be defeated, attacked, exploited. An expression that means this is Achilles heel.

What is the opposite (antonym) of weak?

The direct and commonly used opposite of weak is strong. Strong can be used as the opposite of weak in most contexts, such as a person’s physical strength, the effectiveness of an argument, the flavor of a drink, etc. Other antonyms for weak include hearty and healthy (when weak means ill or frail), bold and brave (when weak means cowardly), and loud (when weak means faint or quiet).

How do you spell weak?

Weak as in lacking strength is spelled with ea. Week as in the period of seven days is spelled with ee. You can remember this because seven also has two e’s.

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

weak weaker weakest

Alphabet and Tesla kicked off big tech earnings to a weak reception as both boosted artificial-intelligence spending plans, amid continued investor fretting over that potential payout.

From MarketWatch ● Jul. 23, 2026

The firm has blamed the effects of US tariffs and weak demand in China.

From BBC ● Jul. 22, 2026

“The global new building solutions market declined slightly during the second quarter due to the continued weak market conditions in China,” the company said.

From The Wall Street Journal ● Jul. 22, 2026

As the technology quickly becomes more sophisticated, cybersecurity is in the spotlight given the risk of advanced AI finding weak points in existing software before humans do.

From Barron's ● Jul. 22, 2026

If you don’t eat that cub, you’ll be too weak to hunt.

From "Wolf Brother" by Michelle Paver

French video games giant Ubisoft on Thursday reported weaker revenues in the first quarter of its financial year, following a tough day of trading that saw its stock plunge.

From Barron's ● Jul. 23, 2026

French auto giant Renault said Thursday that global sales stalled in the first six months of the year, held back by weaker Dacia sales in Europe.

From Barron's ● Jul. 23, 2026

U.S. natural gas futures recovered most of the previous session’s losses to close the week modestly weaker.

From The Wall Street Journal ● Jul. 22, 2026

This gradual decline, known as immunosenescence, can increase vulnerability to age-related health problems and leave some older adults with weaker protection after vaccination.

From Science Daily ● Jul. 21, 2026

Karly seems like the weaker one of us now.

From "Code Name Kingfisher" by Liz Kessler

In May, the Russian economy ministry cut its GDP growth forecast to 0.4% for 2026, putting the country on course for its weakest economic growth since 2022.

From BBC ● Jul. 18, 2026

The economy expanded by 4.3 percent year-on-year in the second quarter -- its weakest pace in more than three years, according to government data on Wednesday.

From Barron's ● Jul. 15, 2026

The yen endured more selling pressure after hitting its weakest level against the dollar since 1986 owing to Fed hike bets and waning hopes for more tightening by the Bank of Japan.

From Barron's ● Jul. 1, 2026

Consumer spending growth was revised lower to 0.5%, the weakest pace in four years.

From The Wall Street Journal ● Jun. 25, 2026

They would bring the siege tower from out of the cover of Mossflower Wood and wheel it to a part of the wall where the defense appeared weakest.

From "Redwall" by Brian Jacques

weak

Frequently Asked Questions

Example Sentences

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