Proto-Slavic neuter o-stems with fixed accent on a non-acute root (accent paradigm b) become masculine, retaining the accent paradigm. Compare:
This rule is important because it operated after the influx of Proto-Germanic/Gothic thematic neuters, which all became masculines in Proto-Slavic. Late Proto-Germanic (after the operation of Verner's law) had fixed accent on the first syllable. Compare:
Proto-Slavic masculine o-stems with fixed accent on a non-acute root (accent paradigm b) become mobile-accent (accent paradigm c). This change is also termed "Holzer's metatony", after linguist Georg Holzer who described it.
Older literature suggests that this was not a Common Slavic innovation, and that there are exceptions in some Croatian Čakavian dialects of Susak and Istria, which have retained the original accentuation. This has been recently disputed.
- Jay Jasanoff. The Prehistory of the Balto-Slavic Accent. p. 163.
- Vermeer 2001
- Ranko Matasović (2008). Poredbenopovijesna gramatika hrvatskoga jezika (in Croatian). Zagreb: Matica hrvatska. ISBN 978-953-150-840-7.
- Willem Vermeer (2001). Critical observations on the modus operandi of the Moscow Accentological School, Werner Lehfeldt, Einführung in die morphologische Konzeption der slavischen Akzentologie, 2d edition, München: Sagner, pp. 131–161.