a ‧ ver /əˈvɜː $ əˈvɜːr/ BrE AmE verb ( past tense and past participle averred , present participle averring ) [transitive]
[ Date: 1300-1400 ; Language: Old French ; Origin: averer , from Medieval Latin adverare 'to show to be true' , from Latin ad- 'to' + verus 'true' ]
formal to say something firmly and strongly because you are sure that it is true SYN declare