The only free and comprehensive online etymological dictionary of the Spanish language
Among these unhappy mortals is the writer of dictionaries; whom mankind considered, not as the pupil, but the slave of science… Every other author may aspire to praise; the lexicographer can only hope to escape reproach, and even this negative recompense has been granted to very few. ~ Samuel Johnson, Introduction to A Dictionary of the English Language (1805)

Dear reader: The Online Etymological Dictionary of Spanish was started on a hot summer night in July of 2015. Observing that no free etymological dictionary yet existed that describes the full development of the Spanish language over thousands of years, our aim was to fill that gap and be a resource for all. A private alpha version of this dictionary emerged in mid-October, 2015. The beta version came out in February, 2016. We were proud to launch the first edition of this website in July of 2016, just under a year later. Our commitment to free, accessible knowledge could not have happened without the help and influence of others. Above all, we would like to thank Douglas Harper, whose pioneering work in creating the Online Etymology Dictionary - a free English-language etymological dictionary - both inspired and fueled us. Harper proved it could be done. Several centuries of work on Indo-European studies, Italic languages, and the Romance family have drawn a picture of Spanish’s long evolution, and clarified the muddy waters of human speech. At the Online Etymological Dictionary of Spanish, it is our hope to share that picture with you in a way that is both engaging and understandable. Sincerely, The OEDoS Team