Dear all, I have heard that verbs are the most unchanging class of grammatical elements of a language (possibly, restricted to Indo-european languages) in terms of semantics. If have gotten this right, nouns, adjectives etc. change semantics more frequently than verbs. For example, the noun "fascination" and has changed meaning from bewitching (cf. http://www.etymonline.com/index.php?term=fascination) to a less dangerous form (cf. http://www.dictionary.com/browse/fascination). Verbs such as eat, sleep still retain their meaning. Note, that the verb "fascinate" has changed semantics. If I gotten this right, it is more likely that verbs are more stable over time, not an absolute guarantee.
When I look for sources (see links), however, I do not find this. Instead I find evidence that can be interpreted as verb are less stable than other grammatical elements (time stability). However, my guess is that this refers to the fact that there are different tenses in verbs not that they are as a class of grammatical elements unchanging. I also found "corpus-based" studies that seems to relate more to what I am looking for.
Questions:
I am looking for a source to either support or not support the argument that looking at activities (in, for example, conceptual modeling) that are related to verbs is better than looking at other classes of grammatical elements since they are less changing.
https://books.google.se/books?id=48xT8RU3AuAC&pg=PA238&lpg=PA238&dq=stability+of+verbs&source=bl&ots=F-wrWtVSiA&sig=cYEsdvY9QJHaYlKVjiHhAkvRG54&hl=en&sa=X&ved=0ahUKEwj0_MuV0t_MAhWM3SwKHZvFDfEQ6AEILTAD#v=onepage&q=stability%20of%20verbs&f=false