沁入

沁入	qìn rù	(usually of sth intangible) to seep into / to permeate
沁	qìn	to seep / to percolate
入	rù	to enter; to go into / to join; to become a member of / (bound form) to conform to (as in 入时) / abbr. for 入声 / (on product packaging, after {number n} + {classifier}) containing (n pieces) (from Japanese 入 "iri")