I am reminded of Mel Brooks' "Two Thousand-Year-Old Man" interviews he did with Carl Reiner. Reiner asked the two thousand-year-old man how some words came to be, and he answered with the story of the word "egg." He said if you get reeeeeeeally close to a chicken when she is laying, and if you listen verrrrrrry closely, you can hear her straining to accomplish her task, and the sound she makes is, "Eh----ehh-----ehhh------ehhhhhhhg!"