lum

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Etymology

Borrowed from Scots lum, Early Scots lumb; further etymology uncertain, but probably from Cumbric *lümon, related to Welsh llumon (“chimney”) (obsolete), from Proto-Celtic *loimono. Possibly at least influenced by Old French lum (“light”), lume (“cooking fire”) (compare French lumière (“light; cavity or channel within a tube or tubular organ, lumen; opening”)), from Latin lūmen (“light; light source; opening through which light can penetrate such as an air-hole or window; opening or orifice in a water-pipe or funnel”), ultimately from Proto-Indo-European *lewk- (“bright; to see; to shine”).

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