May 6, 2017

Late Proto-Indo-European Etymological Lexicon

Current Version: 7.0 (22 Dec 2019)

Creative Commons License

Late Proto-Indo-European Etymological Lexicon
by Fernando López-Menchero
is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.

Based on a work at

The Late Proto-Indo-European Etymological Lexicon is the result of 15 years of constant work by Fernando López-Menchero. It covers core vocabulary of the reconstructed Late Proto-Indo-European language, unlike most dictionaries and lexica available, which are centred on the reconstruction of Middle Proto-Indo-European (or Indo-Hittite) roots. This work sets the standard of excellence for Late Proto-Indo-European lexicography, with more than 4000 words and thousands of potential derivatives, hundreds of explanatory notes – including Indo-Hittite roots, word origins, and conjugation or declension categories and help. With a clear emphasis on North-West Indo-European vocabulary, it provides the most comprehensive and accurate coverage for a Modern Indo-European language revival. Thousands of cognates from ancient languages complement this work for its use in Indo-European studies.

The detailed English/Latin – Proto-Indo-European lexicon has been compiled for years in an Excel file:

Version 6 (2017) formats

Version 6 is provided in its original format, or divided in two PDF files:

Also available for quick reference are the Indo-European Dictionary-Translator tool for Proto-Indo-European – English, English – Proto-Indo-European machine translation and dictionary reference tool. A Latin version (for a higher precision of the original meaning) is also available, and an automatic translation of the English meanings has been published in the German version .

Indo-European word formation paradigm, demonstratives, pronouns

Up-to-date versions of these files are included in the latest edition of the Modern Indo-European Grammar

Please note: the first versions of these files, outdated, were released in 2009 and are displayed in Google Sites

Tentative Modern Indo-European word formation

Before the collaboration of Fernando López-Menchero, there was a section in the grammar dedicated to etymological notes and tentative proposals of a Modern Indo-European lexicon based on modern European words. Most of these examples are outdated, since the aim of the project today is to look for an actual Late Proto-Indo-European reconstruction (with emphasis on North-West Indo-European). Nevertheless, the notes are a good example of the potential of back-translation of common modern Indo-European words:

Etymological Notes in PDF (or read HTML) of A Grammar of Modern Indo-European, First Edition.

Latest Revisions of the Indo-European lexicon

You can share comments and corrections of any kind in form (spelling, expressions, sources) or content directly with the author at, or you can share them publicly in the appropriate forum thread for discussion. Changes will be made as soon as possible after notification:

Versions’ Changes

  • Dec 2019:: (v. 7) New words. Additions and corrections to the old data.
  • May 2017:: (v. 6) New words. Additions and corrections to the old data.
  • 1 Oct 2012:: (v. 5) New words. Additions and corrections to the old data.
  • 3 May 2011:: (v. 4) New words. Additions and corrections to the old data.
  • 01 Oct 2009 :: (v. 3) New words. Additions and corrections to the old data.
  • 09 Jan 2009 :: (v. 2) Full revision of the vocabulary.