Proto-IE: *knewǝ-
Meaning: to scratch, to scrape
Old Greek: knóo-s, knọ̄̂-s `das knarrende Reiben des Reiben an der Radachse; das Geräusch der Füsse beim Marschieren', knǘō `kratzen', knǖ̂ma `das Kratzen', knǘos n. `Krätze'; knǖ̂zda, knǖ̂sa `Krätze', krüzdọ̄̂mai̯ `sich kratze', knǘthos = ákantha mikrá
Slavic: Pol knować `zerstückeln, ästeln', knowie `Strohlspitter'
Russ. meaning: скрести, царапать
References: WP I 392 f
Comments: Cf. similar roots *knap-, *kneit- (and other similar forms in some groups), but there is no evidence of PIE *k[e]n-.
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