Complex sentence: According to Shawangunks historian Marc Fried the words "Kill" came from the Dutch for "wrong brook", the first language of Hardenburgh and other settlers who had moved into the Shawangunk Valley since the 1680s.
Split into simpler sentences: According to Shawangunks historian Marc Fried the words "Kill" came from the Dutch for "wrong brook". Dutch was the first language of Hardenburgh and other settlers who had moved into the Shawangunk Valley since the 1680s.