沉溺

沉溺	chén nì	to indulge in / to wallow / absorbed in / deeply engrossed / addicted
沉	chén	to submerge / to immerse / to sink / to keep down / to lower / to drop / deep / profound / heavy
溺	nì	to drown / to indulge / addicted to / to spoil (a child)
溺	niào	variant of 尿