Where does “roimhesean” come from?

roimhesean (Irish) comes from Irish roimhe, from Middle Irish reme, from Old Irish rïam, from Old Irish ré, from Proto-Celtic ɸrīs, from Proto-Indo-European per-, from Proto-Indo-European pr̥tós — passed , crossed.

roimhesean (Irish): third-person singular masculine emphatic of roimh

Definitions

third-person singular masculine emphatic of roimh

Ancestry of “roimhesean”, step by step

Step	Language	Word	Meaning
1	Irish	roimhe	third-person singular masculine of roimh: before...
2	Middle Irish	reme	—
3	Old Irish	rïam	before it
4	Old Irish	ré	before
5	Proto-Celtic	ɸrīs	before
6	Proto-Indo-European	per-	before, in front; first; to go through
7	Proto-Indo-European	pr̥tós	passed , crossed

Every word from Proto-Indo-European pr̥tós →Every word from Proto-Indo-European per- →Every word from Proto-Celtic ɸrīs →