However, there are some words that *appear* to have "fly" as a prefix, but their origins are a bit more complex:
* Flyover: This word refers to a section of road built over something else, usually another road or a valley. It's actually a combination of "fly" (as in flying) and "over" (meaning above).
* Flyby: This refers to a quick pass of a spacecraft by a celestial body. It's similarly a combination of "fly" (as in flying) and "by" (meaning past).
In general, if you see a word with "fly" at the beginning, it's likely a combination of "fly" as a verb meaning "to move through the air" and another word.
Note: "Fly" itself can also be used as a verb, noun, and adjective, each with their own meanings related to flying.