Aver

Main Entry: aver
Pronunciation: \ə-ˈvər\
Function: transitive verb
Inflected Form(s): averred; aver·ring
Etymology: Middle English averren, from Anglo-French averer, from Medieval Latin adverare to confirm as authentic, from Latin ad- + verus true — more at very
Date: 15th century

1 a : to verify or prove to be true in pleading a cause b : to allege or assert in pleading
2 : to declare positively