INFIRM Synonyms: 99 Similar and Opposite Words

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

Some common synonyms of infirm are decrepit , feeble , fragile , frail , and weak . While all these words mean "not strong enough to endure strain, pressure, or strenuous effort," infirm suggests instability, unsoundness, and insecurity due to old age or crippling illness. // infirm residents requiring constant care

Q: When would 'decrepit' be a good substitute for 'infirm'?

While the synonyms decrepit and infirm are close in meaning, 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 'infirm'?

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

Q: When could 'fragile' be used to replace 'infirm'?

The synonyms fragile and infirm are sometimes interchangeable, but fragile suggests frailty and brittleness unable to resist rough usage. // a reclusive poet too fragile for the rigors of this world

Q: When is it sensible to use 'frail' instead of 'infirm'?

The words frail and infirm are synonyms, but do differ in nuance. Specifically, frail implies delicacy and slightness of constitution or structure. // a frail teenager unable to enjoy sports

Q: When can 'weak' be used instead of 'infirm'?

The meanings of weak and infirm largely overlap; however, weak applies to deficiency or inferiority in strength or power of any sort. // felt weak after the surgery

infirm

adjective

in-ˈfərm

Definition of infirm next

as in weak

lacking bodily strength the elderly and infirm have to be especially careful during the winter months

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How does the adjective infirm contrast with its synonyms?

Some common synonyms of infirm are decrepit, feeble, fragile, frail, and weak. While all these words mean "not strong enough to endure strain, pressure, or strenuous effort," infirm suggests instability, unsoundness, and insecurity due to old age or crippling illness.

infirm residents requiring constant care

When would decrepit be a good substitute for infirm?

While the synonyms decrepit and infirm are close in meaning, 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 infirm?

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

a feeble attempt to walk

When could fragile be used to replace infirm?

The synonyms fragile and infirm are sometimes interchangeable, but fragile suggests frailty and brittleness unable to resist rough usage.

a reclusive poet too fragile for the rigors of this world

When is it sensible to use frail instead of infirm?

The words frail and infirm are synonyms, but do differ in nuance. Specifically, frail implies delicacy and slightness of constitution or structure.

a frail teenager unable to enjoy sports

When can weak be used instead of infirm?

The meanings of weak and infirm largely overlap; however, weak applies to deficiency or inferiority in strength or power of any sort.

felt weak after the surgery

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 infirm The victim of the offense was a person with a disability and the defendant knew or should have known that the victim was a person with a disability or mentally or physically infirm. —

IndyStar, 6 Oct. 2025 Many of those deaths are of infirm inmates who were transferred to the state’s prison hospital in Raleigh for care and died there, records show. —

Charlotte Observer, 4 Aug. 2025 The public and police are encouraged to check on the elderly and infirm. —

Cory Franklin, Chicago Tribune, 13 July 2025 For the elderly or infirm, these displays could show electrocardiogram waveforms, collecting the data from wireless electrodes placed elsewhere on the body. —

IEEE Spectrum, 27 May 2021 See All Example Sentences for infirm

Recent Examples of Synonyms for infirm

Adjective

Bangladesh’s woes have not improved much since Hasina’s ouster, with high inflation and a weak taka currency combining to erode real incomes for ordinary households.

— Charlie Campbell, Time, 13 Feb. 2026
Pinterest posted disappointing fourth-quarter results and gave weak guidance for first-quarter sales.

— Liz Napolitano,Darla Mercado, CFP®, CNBC, 13 Feb. 2026

Definition of weak

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infinity

infirm

infirmaries

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“Infirm.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/infirm. Accessed 15 Feb. 2026.

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Last Updated: 14 Feb 2026 - Updated example sentences

Synonyms of infirm

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