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unfit

[uhn-fit] /ʌnˈfɪt/
adjective
1.
not fit; not adapted or suited; unsuitable:
He was unfit for his office.
2.
unqualified or incompetent.
3.
not physically fit or in due condition.
4.
Biology. pertaining to an organism or population that is not adapted to prevailing conditions or is not producing offspring in sufficient numbers to maintain its contribution to the gene pool of the next generation.
verb (used with object)
5.
to render unfit or unsuitable; disqualify.
Origin
1535-1545
1535-45; un-1 + fit1
Related forms
unfitness, noun
Synonyms
1. inappropriate, unapt. 2. incapable.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unfitness

unfit

/ʌnˈfɪt/
adjective
1.
(postpositive) often foll by for. unqualified, incapable, or incompetent unfit for military service
2.
(postpositive) often foll by for. unsuitable or inappropriate the ground was unfit for football
3.
in poor physical condition
Derived Forms
unfitness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for unfitness
unfit
1545, "not suitable" (in ref. to things), from un- (1) "not" + pp. of fit (see fit (adj.)). In ref. to persons or human qualities, attested from 1551. The verb meaning "to render unfit" is recorded from 1611.
Online Etymology Dictionary, © 2010 Douglas Harper
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