Definitions

weak

[week] / wik /

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not strong adj.
cowardly adj.
faint, soft adj.
deficient, feeble adj.
exposed, vulnerable adj.
watered-down adj.

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

Another technical reason that current market conditions aren’t the same as during the Nasdaq’s September and July dips is that market internals are so weak, Johnson added.

From MarketWatch ● Oct. 16, 2026

A weak year for USC’s health system deepened the shortfall.

From Los Angeles Times ● Oct. 16, 2026

Mahmood says he has criticisms of the film, such as a weak story, but thinks the attention to the "visual identity" of Street Fighter is impressive.

From BBC ● Oct. 16, 2026

The Pac-Man enzyme illustrates how bacteria can exploit these molecular weak points, offering new insight into the relationship between plastic pollution, microbial adaptation, and the future of biodegradable materials.

From Science Daily ● Oct. 16, 2026

“You’d rather cut yourself off at the knees against Nansi? To take your chances with a weak human who can’t do as much as you two can?”

From "Kwame Crashes the Underworld" by Craig Kofi Farmer

While stock-bond correlations have turned positive, an AI-led downturn would resemble a traditional negative demand shock, as weaker capital expenditure, softer hiring and declining household wealth weigh on spending and inflation, he adds.

From The Wall Street Journal ● Oct. 16, 2026

However, it also captures moonlight reflected from Earth's surface and atmosphere, which can make the much weaker airglow difficult to distinguish.

From Science Daily ● Oct. 16, 2026

But Moskow said he was still wondering what, exactly, had caused Pepsi’s weaker execution.

From MarketWatch ● Oct. 15, 2026

The latest steps are mainly concentrated in "strategic infrastructure investment", said Oxford Economics' Yue, meaning that they are "likely to generate weaker near-term employment and income gains than previous stimulus cycles".

From Barron's ● Oct. 15, 2026

No matter how much I loved my doll, I still kept getting weaker and weaker.

From "The Seven Wonders of Sassafras Springs" by Betty G. Birney

The rupiah dropped about 0.8 percent against the dollar to sit at around around 18,060, having hit 18,209 in June, its weakest level on record.

From Barron's ● Oct. 16, 2026

Most home camera systems connect to your Wi-Fi, and your protection is only as strong as the weakest link.

From The Wall Street Journal ● Oct. 11, 2026

Especially since the weakest borrowers are getting hit first.

From MarketWatch ● Oct. 1, 2026

"He is in a corner, at his weakest point", says Tricia Yeoh, Director of the Asian Institute for Policy and Engagement at the University of Nottingham Malaysia.

From BBC ● Sep. 29, 2026

It has no decency, respects no law or convention, shows no mercy It goes for your weakest spot, which it finds with unerring ease.

From "Life of Pi" by Yann Martel

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