Re: Tenkan and Centrifugal Force
Well, I'll take a shot at adding clarity.
I think "ten" kind of means transform, and "kan" kind of means change. Any good explanation for "kai" out there? (or better translations than I gave would be welcome as well!)
When I say kaiten in aikido, I usually mean that I step forward and rotate my body toward my back leg.
When I say tenkan in aikido, I usually mean the same start as above, but then I step back with other leg (that I didn't start stepping with).