tesoro
/teˈsoɾo/ · A2 · noun · m
treasure
💰 tesoro = treasure: same Latin root thesaurus, a storehouse of valuables
Spanish tesoro and English treasure both come from Latin thesaurus (Greek thesauros, storehouse). Drop the h and swap -aurus for -oro. A thesaurus is literally a treasury of words, which is why tesoro covers that meaning too.