<<P.S. Looking through the dictionary I still have found a
cognate to Greek kenteo: given by a professional
linguist (Erich Berneker, 1908-1913): Cymric cethr
'spike,nail'.>>
[Piotr]
<<The Welsh word cethr(en) looks
interesting. I have a Welsh dictionary which glosses it as 'nail, spear' --
exactly the range of meaning expected of *kent-. Welsh also has
the verb cethrenu, cathrenu 'drive, goad',
evidently derived from the noun. To clinch the argument we should look at the
other Celtic languages, but it seems very probable that cethr
is indeed the same as kentrom.>>
Alexander Stolbov