assĕvērātĭo (ads-), ōnis, f. [assevero].
I An earnest pursuit of any thing; hence,
A Of discourse, a vehement assertion , affirmation , asseveration : omni tibi adseveratione affirmo, Cic. Att. 13, 23: confirmatio est nostrorum argumentorum expositio cum adseveratione, Auct. Her. 1, 3; so Quint. 4, 2, 94; 11, 3, 2; Plin. Pan. 67; Tac. A. 6, 2; 4, 42; 4, 52.—
B In Tac., of actions, a persevering earnestness , vehemence , rigor : igitur multā adseveratione ... coguntur patres, etc., Tac. A. 4, 19: accusatio tamen apud patres adseveratione eādem peracta, id. ib. 2, 31.—*
II In the old gram. lang., a strengthening part of speech , a word of emphasis : adiciebant et adseverationem, ut heu, Quint. 1, 4, 20: (adseverat heu, dum miserabili orationi ipsius, qui dicit dolorem, adjungit, Spald.).