Forceful and extreme and rigorous.

Roget 171: strong, energetic, forcible, active; intense, deep-dyed, severe, keen, vivid, sharp, acute, incisive, trenchant, brisk.    rousing, irritation; poignant; virulent, caustic, corrosive, mordant, harsh, stringent; double-edged, double-shotted^†, double-distilled; drastic, escharotic^†; racy etc. (pungent) 392.    potent etc. (powerful) 157; radioactive.    ... show more