Proto-IE: *kneit-, -d-
Meaning: to scratch, to break, to wound
Tokharian: B nitt- 'break, collapse; crush' (Adams 337)
Old Greek: knízdō, aor. knísai̯, pass. knisthē̂n, pf. pass. kéknismai̯ `kratze, reiben, reizen, ärgern', apó-, epí-knisi-s `das (Ab)kratzen etc.'
Celtic: *knidā > MIr cned `Wunde'
Russ. meaning: царапать, ломать, ранить
References: WP I 390 f
piet-meaning,piet-tokh,piet-greek,piet-balt,piet-germ,piet-celt,piet-rusmean,piet-refer,