Synonym: feeble, frail, sickly, unsound, unstable, weak. Antonym: firm. Similar words: infirmary, infirmity, confirm, confirmed, confirmatory, confirmation, firm, firm up. Meaning: [ɪn'fɜrm /-'fɜːm] 
adj. 1. lacking physical strength or vitality 2. lacking firmness of will or character or purpose.
adj. 1. lacking physical strength or vitality 2. lacking firmness of will or character or purpose. 
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31. Children, pregnant women, a very serious high blood pressure, cardio - cerebral vascular disease, the infirm.
32. The recent cab fare increase will hurt the infirm badly.
33. He created at his own expense an infant school, a thing then almost unknown in France, and a fund for aiding old and infirm workmen.
34. However, Jane Eyre's rebellious character experiences a long zigzag period form infirm to firm.
35. Cramming infirm people into one place creates the ideal breeding ground for disease.
36. Large-scale power systems in infirm interconnections which inhere weak natural damping sometimes bring a low frequency self-oscillation phenomenon.
37. That does not answer the question of the the infirm the handicapped, those who are limited.
38. Tom is so infirm of purpose that it is useless to ask him for advice.
39. There seats will be appreciated by the aged and infirm.
More similar words: infirmary, infirmity, confirm, confirmed, confirmatory, confirmation, firm, firm up, firmer, firmly, affirm, firmness, reaffirm, on fire, firmament, terra firma, open fire, affirmation, affirmative, infidel, infinite, infinity, infidelity, infiltrate, ad infinitum, affirmative action, infiltration, infinitesimal, squirm, skirmish.