ācer ācris, ācre, adj. with comp. and sup.
2 AC-, to the senses, sharp, piercing, penetrating, cutting, irritating, pungent: oculi: favilla non acris, no longer glowing, O.: acrior voltus, keener look, O.: acrem flammae sonitum, V.: acri tibiā, H.: canes naribus acres, O.: acetum, H.: stimuli, V.: sol acrior, fierce, H.: stomachus, irritated, H.: hiemps, severe, H.: Aufidus, impetuous, H.— Of mind, etc., violent, vehement, consuming, bitter: odium: dolor, V.: supplicia.—Of intellectual qualities, subtle, acute, penetrating, sagacious, shrewd: animus: ingenium: memoria, ready. — Of moral qualities, active, ardent, eager, spirited, keen, brave, zealous: milites: in armis, V.: acerrimus armis, V.: acer equis, spirited charioteer, V. — Violent, hasty, quick, hot, passionate, fierce, severe: cupiditas: pater acerrimus, enraged, angry, T.: acres contra me: voltus in hostem, H.: virgines in iuvenes unguibus, H.: leo, N.—As subst: ridiculum acri fortius magnas secat res, more effectually than severity, H. — Fig.: prima coitiost acerruma, i. e. most critical, T.: amor gloriae, keen: pocula, excessive, H.: concursus, Cs.: fuga, impetuous, V.: (vos) rapit vis acrior, an irresistible impulse, H.: regno Arsacis acrior est Germanorum libertas, more formidable, Ta.