Englishwane
verb
2 support for the strike was waning:
decrease, decline, diminish, dwindle, shrink, contract, taper off, tail off, subside, slacken, droop, sink, ebb, dim, fade (away), grow faint, lessen, dissolve, peter out, wind down, fall off, attenuate, be on the way out, abate, fail, recede, slump, flag, atrophy, become weak, weaken, give in, give way, melt away, deteriorate, crumble, wither, disintegrate, degenerate, evaporate, collapse, go downhill, draw to a close, vanish, die out;
rare evanesce, remit.
▷antonyms increase, grow.
noun
□ on the wane
the popularity of these films may be on the wane:
declining, on the decline, decreasing, diminishing, dwindling, shrinking, contracting, tapering off, tailing off, subsiding, slackening, drooping, sinking, ebbing, dimming, fading away, growing faint, lessening, dissolving, petering out, winding down, falling off, attenuating, on the way out, abating, failing, receding, slumping, in a slump, in remission, flagging, atrophying, weakening, giving way, melting away, deteriorating, in a state of deterioration, crumbling, withering, disintegrating, degenerating, evaporating, collapsing, drawing to a close, vanishing, dying out, obsolescent, moribund;
informal on one's last legs;
rare evanescing.
▷antonyms increasing, growing.