peh₂-tro-₂

“rock, stone, bedrock”

Widely acceptedmateriallandscape

Peter, petrify, petroleum, petrology

Instrumental form giving Greek petros/petra, English Peter, petrify, petroleum, petrology.

bʰerdʰ-“to cut, split, separate”bʰergh-mn̥“something high, mountain”bʰerǵ-s-“to protect by enclosing”bʰerǵʰ-mn̥-“height, elevated place”bʰredʰ-“to wade through, to cross water on foot”bʰreg-mn̥“that which breaks, fragment”bʰruH-“beam, bridge structure, plank”deru-“tree, wood, to be firm”