late 14c., from Old French averer "verify," from Vulgar Latin *adverare "make true, prove to be true," from Latin ad- "to" (see ad-) + verus "true" (see very). Related: Averred; averring.
例文
1. To aver is to allege in a pleading.
立証は弁護に引用して証明する。
2.In spite of all you say,I still aver that his report is true.