Re: IS PIE * DERU EXCLUSIVELY INDO-EUROPEAN ?

I saw dorsum listed as one of these but I've seen
explanations of it as a compound from Latin de +
orsum.
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Tsalam? t?ob

In that case, the root should be a verb.
de + Verb > Verb
Or
it should be de-HorT-t-yo-
CF. prae-pu:-t-yo

Looks bad.

Arnaud