pieu m (plural pieux)
From Old French pex, pel, from Latin pālus (“post, stake”).
pieu m (plural pieulx)
From Middle French pieu, from Old French pex, pel, from Latin pālus (“post, stake”), from Proto-Italic *pākslos, from Proto-Indo-European *peh₂ǵ-slos, from *peh₂ǵ-. Doublet of pal, which was borrowed.