To swing back and forth, especially if with a regular rhythm.
To vary above and below a mean value.
To vacillate between conflicting opinions, etc.
To rebound or recoil.
To return or send back; to repel or drive back; to echo, as sound; to reflect, as light, as light or heat.
To ring or sound with many echos.
To have a lasting effect.
To send or force back; to repel from side to side.
To repeatedly return.
To fuse by reverberated heat.
To shine or reflect (from a surface, etc.).
Driven back, as sound; reflected.
reverberant