Catenate means to connect things together[1], which implies it was named with multiple files in mind.<p>[1] <a href="https:&#x2F;&#x2F;en.m.wiktionary.org&#x2F;wiki&#x2F;catenate" rel="nofollow">https:&#x2F;&#x2F;en.m.wiktionary.org&#x2F;wiki&#x2F;catenate</a>