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Infirm Adjective From  Infirm  Dictionary  Middle Latin   Of

Title infirm
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Merriam-Webster's Collegiate Dictionary
in·firm

 \\in-ˈfərm\\ adjective
 ETYMOLOGY  Middle English, from Latin infirmus, from in- + firmus firm
 DATE  14th century
1. of poor or deteriorated vitality; especially : feeble from age
2. weak of mind, will, or character : 
irresolute
, vacillating
3. not solid or stable : 
insecure
Synonyms: see 
weak
• in·firm·ly adverb
English Etymology
infirm
  late 14c., "weak, unsound" (of things), from L. infirmus "weak, frail," from in- "not" + firmus (see firm (adj.)). Of persons, "not strong, unhealthy," first recorded 1605.
Oxford Advanced Learner's Dictionary-牛津双解-OALD7
infirm
in·firm in5fE:mNAmE in5fE:rm / adjective1. ill / sick and weak, especially over a long period or as a result of being old
   病弱的;年老体弱的
2. the infirm noun [pl.] people who are weak and ill / sick for a long period
   病弱的人;体弱的人:
   care for the elderly and infirm 
   对年老体弱者的照顾 
Oxford Collocations Dictionary for Students of English
Oxford Collocations dictionary for students of English


infirm 
adj
VERBS be | become 

ADV. mentally, physically

Merriam-Webster's Collegiate Thesaurus-11th Edition
adj. Function: adjective 

Synonyms: 
WEAK
 1, decrepit, feeble, flimsy, fragile, frail, unsound, unsubstantial, ||wanky, weakly 
Antonyms: hale
Webster's Third New International Dictionary, Unabridged
in·firm
I. \(ˈ)in|fərm, ənˈf-, -fə̄m, -fəim\ adjective
Etymology: Middle English infirme, from Latin infirmus, infirmis, from in- in- (I) + firmus strong, firm — more at 
firm
1. : not strong or sound physically : of poor or deteriorated vitality especially as a result of age : 
feeble
 infirm body >
 < support of the poor, the insane, and the infirm — Calvin Coolidge >
2. : weak of mind, will, or character : 
frail
irresolute
, vacillating
 infirm judgment >
 infirm of purpose: give me the daggers — Shakespeare >
3. : not solid or stable : 
insecure
precarious
 < rendered this agreeable assumption … permanently infirm — Berton Roueché >
Synonyms: see 
weak
II. \ə̇nˈf-\ transitive verb
(-ed/-ing/-s)
Etymology: Middle English infirmen, from Latin infirmare, from infirmus infirm
1. obsolete : to make infirm : deprive of strength : 
weaken
2. 
 a. : to make doubtful or challenge the validity of
 b. : 
invalidate
  < either to confirm or to infirm allegations of fact >
• in·firm·able \-məbəl\ adjective

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