Editing Cognate (section)

===Etymon (ancestor word) and descendant words===
An '''[[etymon]]''', or ancestor word, is the ultimate source word from which one or more cognates derive.
In other words, it is the source of related words in different languages. 
For example, the etymon of both Welsh ''ceffyl'' and Irish ''capall'' is the Proto-Celtic *''kaballos'' (all meaning ''horse'').

'''[[wikt: descendant|Descendant]]s''' are words inherited across a language barrier, coming from a particular etymon in an ancestor language. 
For example, Russian ''мо́ре'' and Polish ''morze'' are both descendants of Proto-Slavic *''moře'' (meaning ''sea'').