Synonyms and related words :
abating, allaying, alleviating, assuaging, blunting, chastening, contractive, cushioning, dampening, damping, deadening, declining, decreasing, decrescendo, decrescent, deliquescent, diminuendo, dulling, dwindling, dying, easing, ebbing, fading, languishing, lessening, mitigating, on the wane, receding, reducing, reductive, relaxing, retiring, retreating, shrinking, sinking, softening, subduing, subsiding, tempering, waning,