Where does “llawchwith” come from?

llawchwith (Welsh) comes from Welsh llaw, from Old Welsh lau, from Proto-Brythonic llọβ̃, from Proto-Celtic ɸlāmā, from Proto-Indo-European pl̥h₂meh₂, from Proto-Indo-European plh₂m-, from Proto-Indo-European pelh₂-, from Proto-Indo-European pel- — to cover, to wrap; skin, hide, cloth; to fold.

Ancestry of “llawchwith”, step by step

llawchwith traces back through two separate lines of ancestry.

via Welsh llaw

StepLanguageWordMeaning
1Welshllawhand
2Old Welshlauhand
3Proto-Brythonicllọβ̃palm, hand
4Proto-Celticɸlāmāpalm, hand
5Proto-Indo-Europeanpl̥h₂meh₂palm, hand
6Proto-Indo-Europeanplh₂m-—
7Proto-Indo-Europeanpelh₂-to approach
8Proto-Indo-Europeanpel-to cover, to wrap; skin, hide, cloth; to fold

via Welsh chwith

StepLanguageWordMeaning
1Welshchwithleft
2Proto-Celtic*(s)kīttosleft, left-handed
Every word from Proto-Indo-European pel- →Every word from Proto-Indo-European pelh₂- →Every word from Proto-Indo-European plh₂m- →