aver
v.
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.
〔李〕[a-(ad-);ver] v.宣告(某事)千真万确,断言[法律]证明 ←ver (L verus)=true 真实的