h₂ey-es-
“metal, bronze, copper ore”Widely acceptedmaterialmetallurgy
ore, aes, era
Root yielding Latin aes (bronze/copper), English ore, era (from counting in bronze).
bʰerdʰ-“to cut, split, separate”bʰerǵ-s-“to protect by enclosing”bʰreg-mn̥“that which breaks, fragment”deru-“tree, wood, to be firm”doru-mn̥-“beam, timber, spear-shaft”dʰeyǵʰ-mn̥-₂“wall, thing built from clay”dʰrew-“to be firm, to be solid”gʰel-mn̥-“a shining, gleam, golden thing”