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Synonyms
weak, feeble, frail, fragile, infirm, decrepit mean not strong enough to endure strain, pressure, or strenuous effort.
weak applies to deficiency or inferiority in strength or power of any sort.
feeble suggests extreme weakness inviting pity or contempt.
frail implies delicacy and slightness of constitution or structure.
fragile suggests frailty and brittleness unable to resist rough usage.
infirm suggests instability, unsoundness, and insecurity due to old age or disabling illness.
decrepit implies being worn-out or broken-down from long use or old age.
Examples of infirm in a Sentence
Word History
Middle English, from Latin infirmus, from in- + firmus firm
14th century, in the meaning defined at sense 1
Phrases Containing infirm
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Cite this Entry
“Infirm.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infirm. Accessed 5 Dec. 2024.
Kids Definition
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adjectiveMedical Definition
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adjectiveMore from Merriam-Webster on infirm
Nglish: Translation of infirm for Spanish Speakers
Britannica English: Translation of infirm for Arabic Speakers
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