Where does “bruth-thimthriall” come from?

bruth-thimthriall (Irish) comes from Irish bruth-, from Irish bruth, from Old Irish bruth, from Proto-Celtic brutus, from Proto-Indo-European bʰrewh₁-, from Proto-Indo-European bʰer- — to bear, carry.

bruth-thimthriall (Irish): igneous cycle

Definitions

igneous cycle

Ancestry of “bruth-thimthriall”, step by step

Step	Language	Word	Meaning
1	Irish	bruth-	igneous
2	Irish	bruth	heat; rash, eruption; nap, pile, covering
3	Old Irish	bruth	raging, violent or boiling heat; blaze, glow
4	Proto-Celtic	brutus	boiling heat; fermentation, boiling heat;...
5	Proto-Indo-European	bʰrewh₁-	to boil; to brew
6	Proto-Indo-European	bʰer-	to bear, carry

Every word from Proto-Indo-European bʰer- →Every word from Proto-Indo-European bʰrewh₁- →Every word from Irish bruth- →