The word "rotate" in respect to "key-rotation" has connotations of looping/repeating variable values like a rotor, but as far as I can tell there isn't a single definition available for "key-rotation" that involves re-using a key that was previously replaced.
So why don't we call it key-replacement or something else like that? i.e., why did the cryptography communities decide the more ambiguous word "rotation" was the more appropriate term to describe the act of changing keys?
It just seems a strange phrase to use, especially if you're not a native English speaker.
The only thing I could think of was some sort of an anachronism in reference to oldschool cryptographic key-generators, like the Enigma Machine, or your typical multi-rotor-combo-locks popular for use with bikes & storage lockers.