infirm

[in-furm] / ɪnˈfɜrm /

ADJECTIVE

sick, weak

Synonyms

STRONGEST

ailing anemic decrepit feeble frail ill insecure unstable

WEAK

anile debilitated delicate enfeebled failing faint faltering flimsy fragile halting irresolute laid low lame sensile shaky unsound unsubstantial vacillating wavering wobbly

Antonyms

STRONGEST

healthy sound strong

WEAK

firm hearty robust

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.

You are buying peace of mind and financial support if you become infirm.

From MarketWatch • Jun. 1, 2026

The MoD has previously vowed to speed up the awards process after it was criticised for handling applications too slowly, particularly for elderly and infirm veterans.

From BBC • Feb. 18, 2026

Humanoid robots could assist the elderly or infirm.

From The Wall Street Journal • Oct. 8, 2025

Staples literally got the sick and infirm to stand up.

From Salon • Jun. 17, 2025

They used tools and fire, were good hunters, and apparently took care of their sick and infirm.

From "Sapiens: A Brief History of Humankind" by Yuval Noah Harari

Vocabulary lists containing infirm

Things Fall Apart

Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!

Negatives with "in"

Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!

Feeling Faint: Synonyms for "Weak"

Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!