For words and groups of words, which do not appear in any language with labialized velar-sound [the "pure velars"], it must for the present be left undecided whether they ever had the u-afterclap.
By the 1897 edition of ''[[Grundriss]]'', Brugmann (and [[Berthold Delbrück|Delbrück]]) had adopted Von Bradke's view: "The Proto-Indo-European palatals.. appear in Greek, Italic, Celtic and Germanic as a rule as K-sounds, as opposed to in Aryan, Armenian, Albanian, Balto-Slavic, [[Phrygian language|Phrygian]] and Thracian.. for the most part sibilants."[REF] .