adseveranter
adseveranter, earnestly, emphatically
Could not find adseverantius in Logeion dictionaries. Looking for closest alphabetic form.
adsĕvērantĕr ( ass- ), (adseverans), de façon affirmative (catégorique) : Cic. Att. 15, 19, 2 ; adseverantius Cic. Ac. 2, 61, de façon plus positive.