The Proto-Indo-European word *penk-
Word *penk-
Meaning mud, damp
Synonyms *hₓihₓlu

Comments
Mallory J.P. and Adams D. (2006)

Other words that might be of interest
*ĝhðem-, ĝhðom- ‘earth’, *korpa ‘rock’, *dheu-1 ‘dust, smoke, vapor’, *dór-u- (nom-acc. dóru, gen. derw-ós) ‘tree’, *h₄ék̂mōn ‘stone’, *hₐeĝros ‘pasture, field’, *pérkʷus ‘oak’, *pē(n)s- ‘dust’, *samatha- ‘sand’, *der-, drew- ‘tree, wood’, *bherĝh- ‘mountain, hill’, *bʰerĝh- ‘high, hill’, *dóru ‘wood, tree’, *dhéĝhōm ‘earth’, *gʷorhₓ- ‘mountain, forest’, *h₁er- ‘earth’, *hₐeig- ‘oak’, *kʷrésnos ‘tree, brush(wood)’, *leh₁w- ‘stone’, *lep- ‘stone’, *mai- ‘soil, defile’, *pel(i)s- ‘stone, cliff, rock’, *peru- ‘rock’, *samh̥xdhos ‘sand’, *hₐérh₃wr̥ ‘field’, *kolh₁ōn ‘hill’, *pl̥th₂w-ihₐ- ‘country, land’, *widhu ‘tree, forest’