lumbre

combustible material; fire (matter that has produced or is capable of producing fire); light produced by fire; luminosity, clearness

Etymology tree Proto-Indo-European *lewk- Proto-Indo-European *-s- Proto-Indo-European *-mn̥ Proto-Indo-European *léwksmn̥ Proto-Italic *louksmən Latin lūmen Old Spanish lumne Spanish lumbre From Old Spanish lumbre, lumne, from Latin lūmen (“light source”). First attested in the Cantar de mio Cid. The shift /mn/ > /mbɾ/ is regular and expected: compare hambre and hombre. Cognate with Aragonese llumbre, lumbre, Asturian llume, Catalan llum, Galician and Portuguese lume, Italian lume, and Romanian