Split off from this thread. Frank Moderator EHL I know, I've only learned Slovene properly, nevertheless I can read (with more or less difficulty, and a dictionary at hand) all other Slavic langauges (well, at least most - I haven't yet tried Sorbic, and I am not yet prepared to learn the Glagolitic script, although Cyrillic don't gives me any trouble). Nevertheless, there was change, even in the Slavic world, more so - there were huge changes. And secondly, one couldn't measure change on a linear scale; it would not be correct to suppose 'violent history > rapid change vs. gentle history > slow change'; in fact, IF at all it's more the other way round as heavy suppression tightens the social group and gives the language of the suppressed the meaning of a social marker. This certainly did happen for the Slovenes, if not all Slavs ever living under the rule of the Ottoman, Austro-Hungarian and German Empire. So, it's not so easy as that. The sociolinguistic approach (which I favour) has something to say about change ... but if I were to elaborate, we should open a new thread for that, as this one's about the 'mother' word. Here you've lost me ... wasn't it that you wanted to demonstrate the stability of the Slavic world? In that case, one could (IF anything) suppose that the Slavic world was more conservative before the medieval age. For which, by the way, there actually are indicators of great conservativeness - namely, Indoeuropean, as Common Slavic is very close to it, for a language surfacing only in the early middle ages.