> According to DIL A 19.50, O'Rahilly has an article in S. G. St. i 34, in
> which he concludes that the original meaning of 'achrann, eachrann' is
> 'thicket, tangled undergrowth'. Have you looked at it?
No, Neil, I don't have access to the O-Rahilly piece.
You say this word is late, but I find it listed in various Old Irish
word lists. Is its inclusion in such lists an error?