Direct, abrupt, blunt or unequivocal; not prevaricating.
Of a collision, from the front or in the direction of motion.
With the front of a vehicle.
With direct confrontation.
A collision from the front.
Very swift or quick.
Violent, severe.
Needing only a brief exposure time. (of a lens, plate, film, etc.)
Steep, changing altitude quickly. (of a slope)
a rough section of a river or stream which is difficult to navigate due to the swift and turbulent motion of the water.