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confirm

[kuh n-furm] /kənˈfɜrm/
verb (used with object)
1.
to establish the truth, accuracy, validity, or genuineness of; corroborate; verify:
This report confirms my suspicions.
2.
to acknowledge with definite assurance:
Did the hotel confirm our room reservation?
3.
to make valid or binding by some formal or legal act; sanction; ratify:
to confirm a treaty; to confirm her appointment to the Supreme Court.
4.
to make firm or more firm; add strength to; settle or establish firmly:
Their support confirmed my determination to run for mayor.
5.
to strengthen (a person) in habit, resolution, opinion, etc.:
The accident confirmed him in his fear of driving.
6.
to administer the religious rite of confirmation to.
Origin
1250-1300
1250-1300; < Latin confirmāre to strengthen, confirm (see con-, firm1); replacing Middle English confermen < Old French < Latin, as above
Related forms
confirmable, adjective
confirmability, noun
confirmer; Law. confirmor
[kon-fer-mawr, kuh n-fur-mer] /ˌkɒn fərˈmɔr, kənˈfɜr mər/ (Show IPA),
noun
confirmingly, adverb
nonconfirming, adjective
preconfirm, verb (used with object)
reconfirm, verb (used with object)
unconfirm, verb (used with object)
unconfirmability, noun
Synonyms
1. prove, substantiate, authenticate, validate. 4. fix.
Antonyms
1. disprove. 3. invalidate. 4. shake.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for unconfirmability

confirm

/kənˈfɜːm/
verb (transitive)
1.
(may take a clause as object) to prove to be true or valid; corroborate; verify
2.
(may take a clause as object) to assert for a second or further time, so as to make more definite: he confirmed that he would appear in court
3.
to strengthen or make more firm: his story confirmed my doubts
4.
to make valid by a formal act or agreement; ratify
5.
to administer the rite of confirmation to
Derived Forms
confirmable, adjective
confirmatory, confirmative, adjective
confirmer, noun
Word Origin
C13: from Old French confermer, from Latin confirmāre, from firmusfirm1
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 unconfirmability

confirm

v.

mid-13c., confirmyn "to ratify," from Old French confermer (13c., Modern French confirmer) "strengthen, establish, consolidate; affirm by proof or evidence; anoint (a king)," from Latin confirmare "make firm, strengthen, establish," from com-, intensive prefix (see com-), + firmare "to strengthen," from firmus (see firm (adj.)). Related: Confirmative; confirmatory.

Online Etymology Dictionary, © 2010 Douglas Harper
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