dwi-plo-

“twofold, doubled”

Widely acceptedquantitymultiplication

double, diploma, diplomat, duplex

Compound of *dwi- and *plo- giving Latin duplex, English double, diploma, diplomat, duplicate.

h₁oyn-ḱo-“one time, single instance”h₁weh₂-ḱ-“empty, void, vacant”h₂el-is-“beyond, more, enough”h₂el-no-“all, entire, whole”h₂el-tero-“one of two, the other”h₂embʰo-“both, the two together”h₂ey-kʷo-“each one, every”h₂mey-“to diminish, lessen”