deterioration

1 a gradual sinking and wasting away of mind or body muscle deterioration resulting from prolonged disuse Synonyms debilitation, decay, decaying, declension, degeneration, descent, decline, ebbing, enfeeblement, weakeningRelated Words atrophy; exhaustion; drooping, flagging, limping; regression, relapse, setbackNear Antonyms invigoration, strengthening; progress; rejuvenation, rejuvenescenceAntonyms comeback, improvement, rally, recovery, recuperation, rehabilitation, revitalization, snapback

2 a change to a lower state or level a deterioration in the quality of food at that once-thriving restaurant Synonyms decadence, declension, declination, degeneracy, degeneration, degradation, dégringolade, descent, decline, devolution, downfall, downgrade, ebb, eclipse, fallRelated Words dark age, nadir, sunset; decay, rotting, spoiling; breakup, crumbling, decomposition, disintegration, dissolution; abasement, debasement; depreciation, lessening; decimation, demolishment, demolition, desolation, destruction, havoc, ruin, ruination; abatement, decrease, decrement, de-escalation, deflation, diminishment, diminution, dip, downslide, downtrend, downturn, drop, drop-off, falloff, loss, lowering, reduction, sag, shrinkage, slip, slumpNear Antonyms advancement, development, evolution, growth; blossoming, flourishing, flowering; renewal, restoration, revitalization; heightening; accretion, accrual, addendum, addition, augmentation, boost, enhancement, gain, increase, increment, raise, supplementAntonyms ascent, rise, upswing