The Proto-Indo-European word *h₄ék̂mōn
Word *h₄ék̂mōn
Meaning stone
See also Avestan: asman- ‘stone, sky’
Synonyms *leh₁w-, *lep-, *pel(i)s-

Comments
Gk. akmōn, Lith. akmuo, Ltv. akmens, Skr. aśman, Av. asman, Russ. kamen', Eng. hamer/hammer, Polish kamień, ON hamarr, Hitt. aku, Pers. asman/, Gaul. acaunum, Gm. hamar/Hammer

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’, *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’, *hₓihₓlu ‘mud, swamp’, *kʷrésnos ‘tree, brush(wood)’, *mai- ‘soil, defile’, *penk- ‘mud, damp’, *peru- ‘rock’, *samh̥xdhos ‘sand’, *hₐérh₃wr̥ ‘field’, *kolh₁ōn ‘hill’, *pl̥th₂w-ihₐ- ‘country, land’, *widhu ‘tree, forest’