Meanings
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Thesaurus
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Simplified etymology
The two words spelled light have separate origins. Light meaning “illumination” shares an ancient ancestor with Greek leukos, “white,” and Latin lux, while light meaning “not heavy” comes from the same ancient root as lung, whose name reflects the lungs’ relative lightness among the internal organs. Lightning developed from lighten in its older sense “shed light on.”
Etymology
From Middle English liȝt, lyghte, from Old English lēht, lēoht, līht, from Proto-West Germanic *lį̄ht, from Proto-Germanic *linhtaz or *līhtaz (“light (in weight)”), from Proto-Indo-European *h₁lengʷʰ- (“lightweight”). Cognates Cognate with Dutch licht (“light (not heavy)”), German leicht (“light (not heavy)”), Luxembourgish liicht (“lightweight”), Vilamovian łajcht (“easy”), Yiddish לײַכט (laykht, “light (of low weight)”), Danish let (“light (not heavy)”), Faroese lættur (“light (of weight); easy (to do)”), Icelandic léttur (“light (not weighing much); easy”), Norwegian Bokmål and Norwegian N…