As the settlers (including a good proportion of Irish and Scots, with their own distinctive accents and usages of English) pushed westward, new terms were indeed introduced, and these pioneers were much less reticent to adopt native words or, indeed, to make up their own. The journals of Lewis and Clark, written as they explored routes to the west coast in 1804-6, contain over 500 native words (mainly animals, plants and food). The wild “outlands” west of the Mississippi River gave us the word outlandish to describe its idiosyncratic characters.