Waning

n.

1.

The act or process of waning, or decreasing. This earthly moon, the Church, hath fulls and wanings, and sometimes her eclipses. - Bp. Hall.

Noun	1.	waning - a gradual decrease in magnitude or extent; "the waning of his enthusiasm was obvious"; "the waxing and waning of the moon" Antonyms: waxing - a gradual increase in magnitude or extent; "the waxing of the moon"
Adj.	1.	waning - (of the moon) pertaining to the period during which the visible surface of the moon decreases; "after full moon comes the waning moon" Antonyms: waxing - (of the moon) pertaining to the period during which the visible surface of the moon increases; "the waxing moon passes from new to full"

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