Where does “gualan” come from?

gualan (Scottish Gaelic) comes from Scottish Gaelic an, from Old Irish ín, from Proto-Celtic sindos, from Proto-Indo-European sḗm, from Proto-Indo-European sem- — together, one.

gualan (Scottish Gaelic): carbon

Definitions

carbon

Ancestry of “gualan”, step by step

gualan traces back through two separate lines of ancestry.

via Scottish Gaelic an

Step	Language	Word	Meaning
1	Scottish Gaelic	an	the; their; in
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 Scottish Gaelic gual

Step	Language	Word	Meaning
1	Scottish Gaelic	gual	coal
2	Middle Irish	gúal	charcoal, coal
3	Celtic	*goulos	—

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