deteriorate Play verbBecome progressively worse. SYNONYMS atrophybe in declinebecome dilapidatedbreak downbreak upcollapsecorruptcrumbledecaydeclinedecomposedegeneratedegradedisintegratedropebbfadefailfallfall apartfall downfall to piecesget worsego backwardsgo badgo down the toiletgo down the tubesgo downhillgo offgo to potgo to rack and ruingo to the dogsgo to the packhit the skidsperishputrefyretrograderotsinkslideslipslumpspoilstagnatewaneweakenwitherworsen