Etymograph

English

alundum

Blend of alumina + corundum.

A blend of alumina + corundum

Proto-Indo-European *h₂elut- ‘beer’

Latin alumen ‘alum’

English alumina

Tamil குருந்தம் ‘ruby, sapphire’

English corundum

Today it means

noun alumina, especially an abrasive product made from fused alumina

Language periods are conventional ranges, not dates for this word.

Etymograph / alundum