atronador, -ra, thundering.
aturdido, -a, dumbfounded.
audaz, bold, daring.
audiencia, f., audience.
aumentar, to augment, increase.
aumento, m., increase; va en ——, is increasing.
aun, aún, still, even, yet.
aunque, although.
ausencia, f., absence.
automóvil, m., automobile.