MOR107 - Reduplication 

Reduplication comes from Latin reduplicatio meaning doubling, folding. It is the act or result of doubling a sound, word, or word element, usually for grammatical or lexical purposes. It is one of the most natural processes of forming compound words. In this tandem E-Lecture, Prof. Dr. Birte Bös and Prof. Dr. Jürgen Handke discuss the main principles of reduplication in PDE as well as in other languages.
0:39 Across Languages
1:13 Total Reduplication
1:43 Partial Reduplication
2:10 Ablaut Types
2:35 Rhyme-Motivated Reduplication
2:55 Redplication in PDE
4:05 Reduplication Across Languages