Try "dúile". (To which you may wish to add a qualifier.)
Scríobh Lynne Barton <[log in to unmask]>:
> [log in to unmask] writes:
> << > Is there a single word (or phrase) in Old or Middle Irish for the
> > 'Nature Spirits' that would encompass spirits of Land, Sea and Sky?
> The only one-word term I can think of that might cover "nature
> is aindia (sg.).... >> <SNIP>
> I thank you most kindly for this information.
> Best Regards-
> Lynne Barton