Pick a word, like butterflies. How did that word come to be? Were there some flying insects around the butter churn one day and forever after flying insects with pretty wings shall be known as butterflies? Or was it some odd story about people throwing butter during an argument and a splat of butter landed on a flying bug and .... did the rest become history? Don't look up the real story until later. Come up with a more interesting and yet (at least slightly) possible explanation for the word yourself.