Over 200 lemmata added and 22 new sources consulted. While those numbers reflect a great deal of work, the majority of our labors was spent on the already-existing material. Every entry received a much-needed re-formatting, erroneous cognates were corrected, and writing was edited for grammar and tone.

Big update today! We've been quite busy these last few months, but we want to wish you all a happy New Year. Today we are excited to announce that the etymologies of surnames, first names, towns, and other toponyms will be added to the Dictionary. Already-existing entries have been edited to include this information.

Huge update today. We have added dialect variants and Romance, Italic, Celtic, Germanic, Balto-Slavic, Albanian, Hellenic, Armenian, and Indo-Iranian Cognates as well as lexical material in Tyrrhenian and Afro-Asiatic languages when relevant to thousands of entries.

We've also created a new Facebook page, so follow us to receive updates, news, and other notifications.

Welcome to the Online Etymological Dictionary of Spanish (OEDoS), a free etymological dictionary of the Spanish language launched on August 6, 2016. An etymology is not a definition but a history of a word over time. This site provides an account of the development of the Spanish language as best as historical linguists are able to ascertain in a way that is accessible both by laymen and academics.

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