Where does “palus” come from?

palus (Latin) comes from Proto-Italic pākslos, from Proto-Indo-European peh₂ǵ-slos, from Proto-Indo-European peh₂ǵ- — to attach.

Ancestry of “palus”, step by step

Step	Language	Word	Meaning
1	Proto-Italic	pākslos	—
2	Proto-Indo-European	peh₂ǵ-slos	—
3	Proto-Indo-European	peh₂ǵ-	to attach

palus — Etymology, Origin & Word History | Etymology Explorer