My Fellow Americans! How do you pronounce envelope?

I think I flipped back-and-forth, and pronounce it both ways. Sitting here thinking about it, I can't distinguish how or why I might pronounce it one way versus the other on any given occasion. The school secretary at my small, private high school was very sweet lady obviously from the deep south, and also apparently under educated. I vividly remember that she used to pronounce the word "envelope" when referring to the paper pocket with a flap in which you put other papers, the same way you would pronounce envelope if using it as a verb. WAIT! I just asked Siri for the definition of envelope, and it didn't list it as a verb. I've heard "envelope" used in waste similar to this: "the fog enveloped the street lights". OR "She enveloped her grieving friend in a warm embrace." Have I lost my mind? Has anyone heard or used envelope as a word, similar to my examples above?