The only free and comprehensive online etymological dictionary of the Spanish language
impulso m. (Noun) "impulse"

Late 15th cent. From Latin impulsus 'id.,' from impellere "to push against," "to incite." From in- "in" (see in-) and pellare "to drive" (see pulso).

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.

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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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