treasure (v.) Look up treasure at Dictionary.com
late 14c., "to amass treasure; to store up for the future," also figurative, "regard as precious, retain carefully in the mind," from treasure (n.). Related: Treasured; treasuring.
treasure (n.) Look up treasure at Dictionary.com
mid-12c., tresor, from Old French tresor "treasury, hoard, treasure" (11c., Modern French trésor), from Gallo-Roman *tresaurus, from Latin thesaurus "treasury, treasure" (source also of Spanish, Italian tesoro), from Greek thesauros "store, treasure, treasure house" (see thesaurus). In Middle English also thresur, etc.; modern spelling is from 16c. Replaced Old English goldhord. General sense of "anything valued" is recorded from c. 1200. Treasure hunt is first recorded 1913. For treasure trove, see trove.