NATLANG: Latin prefixes with er/ra

There are a few that I can think of (knowing no Latin):

super-/supra-
ulter-/ultra-
infer-/infra-
inter-/intra-

Is there some kind of pattern, other than that the first of each pair can
prefix "-ior" in English? Or, indeed, is that itself a pattern that I'm
too dense to work out? It's not[*] equitive vs comparative, it's not
comparative vs superlative, it's not location vs direction, it's not
proximal vs distal, and it's not any of a half dozen other things that
have passed through my brain.

Whatever the pattern is, I suspect that knowing it would shed light for me
onto some greater issue with Latin, or possibly PIE.

Thanks in advance for any concrete solutions, or crackpot theories,

[*] Note throughout this sentence, the arrogantoid voice applied to the
essive: I can't understand how it is, therefore it is not.



Paul

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