recrudescing

Indeed, it seemed easy for this recrudescing Arab Volk to adopt fanatical terror tactics in its effort to repel foreigners and find its unique Islamic Sonderweg -- that is, "special path."

James Pinkerton: Grave Wisdom from a Grave Oxford Don 2008

The Aryan languages, since they began to be, have been spreading out and retreating, mixing and changing and interchanging; one imposed on another, hidden under another, and recrudescing through another; through ten or a hundred thousand years, -- or however long it may be; just as they have been doing in historical times.

The Crest-Wave of Evolution A Course of Lectures in History, Given to the Graduates' Class in the Raja-Yoga College, Point Loma, in the College-Year 1918-19 Kenneth Morris 1908