Barrage

Antonyms of barrage:
dribble, drip, trickle.
Examples of usage:
  1. The barrage was fierce and concentrated.
    "A Yankee Flier in Italy", Rutherford G. Montgomery.
  2. I could fancy him grinning behind the sheen of his barrage at my question.
    "Astounding Stories of Super-Science, March 1930", Various.
  3. And in ten minutes they were all rushing forward again, straight through the barrage- and the two lieutenants were killed.
    "Elizabeth's Campaign", Mrs. Humphrey Ward.