convalesce, plain, recover, recuperate, unembellished, unornamented

worsen, erode, crumble, stagnate, disintegrate, weaken, dwindle, shrivel, stabilizes, implode, escalate, shrink, depreciate, recede, wither, smolder, falter, plummet, regress, evaporate, degenerate, persist, wane, harden, normalize, disappear, darken, abate, decelerate, degrade, subside, sag, deplete, improve, exacerbate, rot, corrode, fester, slacken, depress, grow, decay, diminish, skyrocket, seep, suffer, vanish, thaw, aggravate, fluctuate, dissipate, decline, ravage, bleed, sputter, melt, languish, decompose, proliferate, calcify, evolve, dries, fraying, fade, softening, flatten, intensify, rise, oxidize, burgeon, impair, teeter, ossify, creep, constrict, accumulate, erupt, happen, steepen, lose, sink, affect, droop, swell, soured, reassess, unravel, thicken, discolor, outstrip, endanger, totter, permeate, ruin, unfold, linger, soar, pervade, blossom, curdle, outgrow, constrain

age, fade, fatigue, get on, jade, languish, pall, rot, tire, waste, wear, weary, wear off, wear out, wear thin

corrode, eat, eat at, erode, get worse, gnaw, gnaw at, relapse, rust, wear, wear away, wear off, wear out, wear thin

crumble, decay, decline, delapidate, worsen

degenerate, drop