: weaken, detract from sth, let up, become less strong, intense, etc, relax one's efforts
n.: rallentando, slacken off, feather out, turn the edge of, drop off, die away, die away become so faint or weak that it is no longer noticeable, let-up, reduction in strength, intensity, etc, relaxation of efforts, attenuation
v.: fall off, soft-pedal, down, become less violent, active, intense, etc, waver, be or become weak or unsteady, falter, weaken, abate, go, attenuate, bate, deaden, decrease, lower, recede