Repercussive /(-k?s"?v)/

Re·per·cuss·ive

Repercussive

a.
  1. Tending or able to repercuss; having the power of sending back; causing to reverberate.
    Ye repercussive rocks! repeat the sound.
    — W. Pattison.
  2. Repellent. [Obs.]
  3. Driven back; rebounding; reverberated.

Repercussive

n.
  1. A repellent. [Obs.]