I just read this in the Wikipedia article on the Mattaponi River and it really tickled me. If only all language were so rational!
The Mat River and the Ta River join in Spotsylvania County to form the Matta River; The Po River and the Ni River join in Caroline County to form the Poni River; The Matta River and the Poni River join in Caroline County to form the Mattaponi River.
I am lucky in that reasoning abstractly about grammatical rules is a good fit for the way my mind works; even so, I only got good at it after I learned a second language.
I just read this in the Wikipedia article on the Mattaponi River and it really tickled me. If only all language were so rational!