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infinite elasticity of supply
infinite loop
infinitesimal
infinitesimal calculus
infinitesimal dose
infinitive
infinitude
infinity
infirm
infirmary
infirmity
infix
infl.
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infirm

in·firm [ in fúrm ]


adjective 
Definition:
 
1. not strong: lacking strength and vitality because of sickness or age

2. irresolute: lacking firmness of character or a strong will

3. construction structurally unsound: having a structure that is weak and/or damaged

4. law legally unsound: describes a legal claim that is invalid or not supported



plural noun 
Definition:
 
people who are not strong: people who lack strength and vitality, e.g. because of sickness or age ( sometimes considered offensive )

[14th century. < Latin infirmus< firmus "firm"]

in·firm·ly adverb
in·firm·ness noun

Word Key: Synonyms

See weak.

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