Thread:User talk:CodeCat/PIE *plōtus etymology/reply

The problem is that there is no established sound change that would turn -ōw- into -ō-. -ōw- was allowed as a diphthong in Proto-Indo-European, just compare. So the change of -ōw- to -ō- must be accounted for somehow. Furthermore, the Germanic form does not necessarily need to reflect. The -ō- could also originate from -eh₂- or -eh₃-. In fact, M Philippa's etymological dictionary of Dutch (which I've found to be very reliable over time) mentions a root as a possible source of the Germanic words.