>> (a) Ua bháit[h]er bûaigh n-ôg
>> (b) adhbh ciuil lebur lêir
>> (c) ’na n-io[n]gh(n)ais ni h-âil
>> (d) a dîoghrais bii déin
>> (a) By extinction [there is] a complete victory!
>> (b) A musical instrument, a serious book:
>> (c) it is not desirable to be without them
>> (d) in a choice, fleeting life.
> Victory in extinction" sounds Buddhist, too. :-) But what
> would that formula be doing here in the poem?
True bliss only comes with death, but our fleeting lives can be made
more pleasant by music and books.