treasure (n.) Look up treasure at Dictionary.com
mid-12c., from Old French tresor "treasury, treasure" (11c.), from Gallo-Romance *tresaurus, from Latin thesaurus "treasury, treasure" (cf. Spanish, Italian tesoro), from Greek thesauros "store, treasure, treasure house" (see thesaurus). 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.
treasure (v.) Look up treasure at Dictionary.com
late 14c., "to amass treasure; to store up for the future," also figurative, from treasure (n.). Related: Treasured; treasuring.