
Quake - Also Old English, so old it apparently has no known source outside of England. Original meaning to tremble.
Earthquake - Dates back to 1288, spelled eorthequakynge, and meant then exactly what it means today.
Which leads me to remember that old Dorothy Parker story. In a parlor game, Miss Parker was asked to use the word "horticulture" in a sentence. Her reply was, "You can lead a horticulture (whore to culture) but you can't make her think.Which is my way of saying that Sarah Palin choose an absolutely perfect, totally appropriate title for her book.