沉沦

沉沦	chén lún	to sink into (vice, depravity etc) / to pass into oblivion / downfall; passing
沉	chén	variant of 沉
沉	chén	to submerge / to immerse / to sink / to keep down / to lower / to drop / deep / profound / heavy
沦	lún	to sink (into ruin, oblivion) / to be reduced to