to cherish = ìì€í ìŹêž°ë€, ìì€í ê°ì§íë€, ìì€í êž°ì”íë€.
treasure = ëłŽëŹŒ (precious thing), 볎배 (precious person or thing), ìì€í ìŹë (precious person), ìì€í êČ (precious thing).
For both phrases, the adjective ìì€íë€ (precious, important, cherished) is the underlying idea. ëłŽëŹŒ and 볎배 seem to lack the sense of personal attachment.