熟稔

熟稔	shú rěn	(literary) to be very familiar with (sb or sth); well acquainted with; fully conversant with
熟	shú	ripe; mature / thoroughly cooked; done / familiar; acquainted / experienced; skilled / (of sleep etc) deep; profound / also pr. [shou2]
稔	rěn	(literary) ripe grain; ripe; harvest; year / (literary) very familiar with; well acquainted with