As many of my readers know, I am obsessed with words, and the other day I was thinking about the word “sweat”, something that I could add to the list of words that are both nouns and verbs. And, figuring that the noun—the water that oozes out of our skin pores—must have come before the verb, I thought to myself, “I wonder when the first sweat happened? (A less morbid thought than wondering when was the first suicide.) So, here is what I came up with: