/ əˈfɜːm; NAmE əˈfɜːrm/ verb
( formal ) to state firmly or publicly that sth is true or that you support sth strongly
SYN confirm :
[ vn ]
Both sides affirmed their commitment to the ceasefire.
[ v that ]
I can affirm that no one will lose their job.
[also v speech ]
► af·firm·ation / ˌæfəˈmeɪʃn; NAmE ˌæfərˈm-/ noun [ U , C ]:
She nodded in affirmation.
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WORD ORIGIN
Middle English (in the sense make firm ): via Old French from Latin affirmare , from ad- to + firmus strong.