Where does “lasán” come from?

lasán (Irish) comes from Irish án, from Old Irish ín, from Proto-Celtic sindos, from Proto-Indo-European sḗm, from Proto-Indo-European sem- — together, one.

lasán (Irish): flame, flash; flash of anger; match

Definitions

flame, flash; flash of anger; match

Ancestry of “lasán”, step by step

lasán traces back through two separate lines of ancestry.

via Irish án

Step	Language	Word	Meaning
1	Irish	án	bright, brilliant; splendid, noble
2	Old Irish	ín	fast, period of fasting
3	Proto-Celtic	sindos	this
4	Proto-Indo-European	sḗm	one
5	Proto-Indo-European	sem-	together, one

via Irish las

Step	Language	Word	Meaning
1	Irish	las	to light; to blaze

Every word from Proto-Indo-European sem- →Every word from Proto-Indo-European sḗm →Every word from Proto-Celtic sindos →