It's an exercise. I would have much preferred using the 20k most common words or something like that. The first thing that came to mind is "elevator" which is w

It's an exercise. I would have much preferred using the 20k most common words or something like that. The first thing that came to mind is "elevator" which is where the equivalence eureka comes from. It can be done in British English as "lift" but difficult otherwise. Elevators are cool like telephone booths. I've wondered what a dog thinks using them for the first time, then accepting what they do and how much they understand its geometries.