to cherish = ěě¤í ěŹę¸°ë¤, ěě¤í ę°ě§íë¤, ěě¤í 기ěľíë¤.
treasure = 보돟 (precious thing), ëł´ë°° (precious person or thing), ěě¤í ěŹë (precious person), ěě¤í ę˛ (precious thing).
For both phrases, the adjective ěě¤íë¤ (precious, important, cherished) is the underlying idea. 보돟 and ëł´ë°° seem to lack the sense of personal attachment.