On our Facebook page I often joke about foiling this that or the other things. I have foiled hearts, nuthatches, crosses, and even the last names of loved ones. I am am unstoppable in what I will not foil. Today as I foiled this commissioned peace symbol, I wondered. What root word could come to mean both, prevent success and a thin sheet of metal.
And the answer is none. Two root words have led to our word, foil.
First ~> [Middle English foilen, to trample, defile, variant of filen, to defile; see file3.]
Second ~> [Middle English, from Old French foille, from Latin folia, pl. of folium, leaf; see bhel-3 in Indo-European roots.] both provided by the free dictionary
Now to what I imagined, what would I use my powers on if I could truly foil while foiling. Squirrels eating bird food may be an impressive start. Ebola would be fine to foil. Is there a sign for ignorance as there is for peace?
What shall I foil?