lessening

decreasing, declining, waning, ebbing, dropping, diminishing, abating, slowing, dwindling, sinking, sagging, subsiding, moderating, slackening, ebbing, lowering, shrinking, drying up, shriveling up, depreciating, softening, quieting, lightening, weakening, decaying, narrowing, drooping, wasting, running low, running down, dying away, dying down, withering away, fading away, wearing off, wearing out, wearing away, wearing down, falling away, falling off, slacking off, growing less and less, losing momentum, losing spirit, slumping, in a slump, plunging, plummeting, going down, going back, in reverse, getting worse, getting lower, getting slower.

decrease, decline, shrinkage; see discount, reducing, reduction 1.