Reconstruction:Proto-Indo-European/kneyd-

This Proto-Indo-European entry contains reconstructed terms and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.

Proto-Indo-European

Alternative reconstructions

*kniHd-^[1]^[2]

Root

*kneyd-^[3]^[4]^[5]

to scratch
Synonym: *kneh₂-

Reconstruction notes

Höfler 2025 posits that a zero-grade non-ablauting root *kníHd- could account for all of the proposed descendants of *kneyd- and also the terms Ancient Greek κνίση (knísē) and κνίδη (knídē). Höfler proposes that κνίδη (knídē) may reflect *kníHd-éh₂ and that κνίση (knísē) may reflect a pre-form *kníHdseh₂. According to Höfler, the Weather Rule would have led to the deletion of the laryngeal in the sequence *knid-yé-ti, thereby explaining κνίζω (knízō).^[1] Beekes tentatively also reconstructs *kniHd-, but considers the long vowels in nīdor, κνῖσα (knîsa), and κνῑ́δη (knī́dē) to be problematic for an Indo-European etymon.^[2]

Derived terms

Terms derived from the Proto-Indo-European root *kneyd- (1 c, 0 e)

*knéyd-e-ti (thematic root present)
- Proto-Germanic: *hnītaną (see there for further descendants)
*knid-yé-ti (yé-present)
- Proto-Hellenic:
  - Ancient Greek: κνίζω (knízō)
*knid-tós
- Proto-Celtic: *knissos
*knéyd-os?
- Proto-Italic: *knīdos?
  - >? Latin: nīdor

Unsorted formations

Celtic:
- Proto-Celtic: *knidā
Balto-Slavic:
- Lithuanian: kni̇̀sti
- Latvian: knidêt

References

↑ ^1.0 ^1.1 Stefan Höfler (22 August 2025), “Smells like Metonymy”, in Jesús de la Villa, Araceli Striano, and Rodrigo Verano, editors, Advances in Ancient Greek Linguistics‎^[1], De Gruyter, →DOI, →ISBN, pages 179-194
↑ ^2.0 ^2.1 Beekes, Robert S. P. (2010), Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), with the assistance of Lucien van Beek, Leiden, Boston: Brill, →ISBN, pages 724-725
^ Rix, Helmut, editor (2001), Lexikon der indogermanischen Verben [Lexicon of Indo-European Verbs] (in German), 2nd edition, Wiesbaden: Dr. Ludwig Reichert Verlag, →ISBN, page 366
^ Beekes, Robert S. P. (2010), “κνίζω”, in Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), with the assistance of Lucien van Beek, Leiden, Boston: Brill, →ISBN, page 724
^ Katsiaryna Ackermann (2018), “Root Variation vs. Root Extension – a Putative -i-Infix?”, in Historische Sprachforschung / Historical Linguistics‎^[2], volume 131, →ISSN, pages 98–144