WEAK Synonyms: 289 Similar and Opposite Words

Q: How does the adjective 'weak' contrast with its synonyms?

Some common synonyms of weak are decrepit , feeble , fragile , frail , and infirm . While all these words mean "not strong enough to endure strain, pressure, or strenuous effort," weak applies to deficiency or inferiority in strength or power of any sort. // felt weak after the surgery

Q: When is it sensible to use 'decrepit' instead of 'weak'?

The synonyms decrepit and weak are sometimes interchangeable, but decrepit implies being worn-out or broken-down from long use or old age. // the dowager's decrepit retainers

Q: In what contexts can 'feeble' take the place of 'weak'?

Although the words feeble and weak have much in common, feeble suggests extreme weakness inviting pity or contempt. // a feeble attempt to walk

Q: When might 'fragile' be a better fit than 'weak'?

While in some cases nearly identical to weak , fragile suggests frailty and brittleness unable to resist rough usage. // a reclusive poet too fragile for the rigors of this world

Q: When is 'frail' a more appropriate choice than 'weak'?

The meanings of frail and weak largely overlap; however, frail implies delicacy and slightness of constitution or structure. // a frail teenager unable to enjoy sports

Q: Where would 'infirm' be a reasonable alternative to 'weak'?

The words infirm and weak are synonyms, but do differ in nuance. Specifically, infirm suggests instability, unsoundness, and insecurity due to old age or crippling illness. // infirm residents requiring constant care

weak

adjective

ˈwēk

Definition of weak

as in weakened

lacking bodily strength the little boy was simply too weak to lift the box

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Antonyms & Near Antonyms

as in soft

lacking strength of will or character I was too weak to resist the free doughnuts in the office break room

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Antonyms & Near Antonyms

as in thin

not containing very much of some important element the coffee came out too weak because I didn't use enough ground beans

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as in unreasonable

not using or following good reasoning your argument is weak

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as in helpless

unable to act or achieve one's purpose the vice president is a relatively weak official

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Antonyms & Near Antonyms

Synonym Chooser

How does the adjective weak contrast with its synonyms?

Some common synonyms of weak are decrepit, feeble, fragile, frail, and infirm. While all these words mean "not strong enough to endure strain, pressure, or strenuous effort," weak applies to deficiency or inferiority in strength or power of any sort.

felt weak after the surgery

When is it sensible to use decrepit instead of weak?

The synonyms decrepit and weak are sometimes interchangeable, but decrepit implies being worn-out or broken-down from long use or old age.

the dowager's decrepit retainers

In what contexts can feeble take the place of weak?

Although the words feeble and weak have much in common, feeble suggests extreme weakness inviting pity or contempt.

a feeble attempt to walk

When might fragile be a better fit than weak?

While in some cases nearly identical to weak, fragile suggests frailty and brittleness unable to resist rough usage.

a reclusive poet too fragile for the rigors of this world

When is frail a more appropriate choice than weak?

The meanings of frail and weak largely overlap; however, frail implies delicacy and slightness of constitution or structure.

a frail teenager unable to enjoy sports

Where would infirm be a reasonable alternative to weak?

The words infirm and weak are synonyms, but do differ in nuance. Specifically, infirm suggests instability, unsoundness, and insecurity due to old age or crippling illness.

infirm residents requiring constant care

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of weak Indiana represented the United States in the FISU America Games in Lima, Peru, and cruised to gold in a pretty weak field. — Cj Moore, New York Times, 26 Aug. 2026 The less we’re reminded of Reacher’s third and weakest season, the better. — Chris Klimek, Vulture, 26 Aug. 2026 In Gramsci’s telling, wars of maneuver could succeed where the state had a tight grip and the institutions of civil society (churches, schools, unions, professional organizations, the press) were weak and malleable, as in Imperial Russia. — Dhruv Khullar, New Yorker, 25 Aug. 2026 By consolidating two of the five largest distributors, Bonta and 11 other state attorneys general argue, the merger will put theaters in a weaker position in negotiations over windows and revenue splits. — Gene Maddaus, Variety, 25 Aug. 2026 See All Example Sentences for weak

Recent Examples of Synonyms for weak

Adjective

Most often, those who do seek medical attention are people who are more susceptible to foodborne illnesses, such as children, older adults, pregnant people and people with weakened immune systems.

— Kimberly Baker, The Conversation, 31 Aug. 2026
Most people recover within several days, but infections can become serious for young children, older adults and people with weakened immune systems.

— Anthony Thompson, USA Today, 28 Aug. 2026

Definition of weakened

Adjective

Offer a realistic time, suggest a softer plan, and let honesty keep the connection easy.

— Tarot.com, The Orlando Sentinel, 29 Aug. 2026
There has always been something compelling about Paul Baker, something about the interplay between his frat-star good looks and Canadian soft-boy heart.

— Ben Rosenstock, Vulture, 28 Aug. 2026

Definition of soft

Adjective

Days turn crisp, aspens begin streaking the valley with gold and summer crowds thin in Grand Teton National Park.

— Brittany Anas, Forbes.com, 30 Aug. 2026
Unlike mainstream fusion projects such as tokamaks, the Texatron does not rely on giant superconducting magnets to hold a thin gas in place for long periods.

— Aman Tripathi, Interesting Engineering, 30 Aug. 2026

Definition of thin

Adjective

Muslims who are peace-loving and helpless also need a hand up.

— Sun Sentinel Editorial Board, Sun Sentinel, 24 Aug. 2026
Yes, there were moments of humor, such as getting magic potions around the campfire at the end of each stage by whacking helpless little elves, but most of it was played straight, to great effect.

— Ollie Barder, Forbes.com, 21 Aug. 2026

Definition of helpless

Adjective

Instead of using a mirror to gather starlight, MOTHRA has many telephoto lenses, like those on a camera, which can capture faintly glowing wisps of gas and other feeble emanations across a wider field of view.

— Mary Randolph, Scientific American, 12 Aug. 2026
By an act of war, committed with the participation of a diplomatic representative of the United States and without authority of Congress, the Government of a feeble but friendly and confiding people has been overthrown.

— Britannica Editors, Encyclopedia Britannica, 11 Aug. 2026

Definition of feeble

Adjective

In the last decade, Jackson has paid a Miami company more than $35 million to discharge mostly frail patients with nowhere to go into assisted living beds.

— Carol Marbin Miller, Miami Herald, 27 Aug. 2026
Up there, the wind is your neighbor, whistling through the walls and frail window panes.

— Megan Rose Murray, Condé Nast Traveler, 22 Aug. 2026

Definition of frail

Adjective

Finally, the third recruits seaweed to gather minerals that are otherwise too dilute to chase.

— New Atlas, New Atlas, 27 July 2026
Clean and disinfect your pruning shears between working on each plant by dipping them into a dilute 10% solution of chlorine bleach water or rubbing alcohol.

— Mary Marlowe Leverette, Southern Living, 4 July 2026

Definition of dilute

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“Weak.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/weak. Accessed 1 Sep. 2026.

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Synonyms of weak

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