*hratan

There's still no conclusive evidence that this verb is from *hrītaną though.

I could not find any conclusive evidence and that's why I have created a new entry for rit. It's rather uncommon outside Northern England, but can still be encountered in the Midlands. The etymology for rit is somewhat clearer.

On second thought, it is also unclear where the verb rit comes from. The Middle English Dictionary says that it derives from unattested Old English *rittan not *hrītan. rit is pronounced with a short i, by the way, and rat also has a short vowel.

Another thing that keeps bugging me is that the verb rat has a form to-rat which is very similar to Dutch terijten and German zerreißen and as far as I know the verb rit does not have such a form. Why would it have such a form (i.e., to-rat) if it did not come from *hrītaną? I mean, there is a rather small number of words out there that are prefixed with to- in English (including dialects and late Middle English) and almost all such words have cognates in German, Dutch and other Germanic languages. How would you explain that?

I fixed the etymology for rit the best I could. However, I am still not sure about what to do with rat.

Ask at WT:ES maybe?