Waning

Adjective

 * 1) Becoming weaker or smaller.
 * 2) Especially of the lunar phase as it shrinks when viewed from the Earth.

Noun

 * 1) The fact or act of becoming smaller.
 * 2) The fact or act of becoming less or less intense.

Verb
waning



Thesaurus
aging, at rest, calm, cloistered, coming apart, contractive, cool, cracking, crumbling, decadent, declining, decreasing, decrescendo, decrescent, degenerate, deliquescent, deteriorating, diminishing, diminuendo, disintegrating, doting, draining, drooping, dwindling, dying, ebbing, effete, even-tenored, fading, failing, falling, flagging, fragmenting, getting on, going to pieces, growing old, halcyon, hushed, impassive, isolated, languishing, lessening, marcescent, moldering, on the wane, pacific, peaceable, peaceful, pining, placid, quiescent, quiet, receding, reductive, regressive, reposeful, reposing, restful, resting, retiring, retreating, retrograde, retrogressive, secluded, senescent, sequestered, sequestrated, sheltered, shrinking, shriveling, sinking, sliding, slipping, slumping, smooth, still, still as death, stillish, stilly, stoic, stolid, subsiding, tabetic, tranquil, unagitated, undisturbed, unmoved, unperturbed, unruffled, unstirring, untroubled, wasting, wilting, withering, worsening