Examples: cartography card archaeology archetype monarchy legal loyal purse personal cinema kinase car carpenter hippopotamus Mesopotamia dative data date
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Proto-Indo-European *lewk-

→ English look (mention)
→ English light (root)
→ English light (mention)
→ English light (derived)
→ English lynx (root)
→ English lynx (derived)
→ English low (derived)
→ English lunar (root)
→ English lunar (derived)
→ English lune (root)
→ English risk (derived)
→ English Oslo (mention)
→ English lumen (root)
→ English lux (root)
→ English lux (derived)
→ English luna (root)
→ English levin (derived)
→ English lea (root)
→ English Lucifer (root)
→ English translucent (root)
→ English lucid (root)
→ English louche (root)
→ English luminous (root)
→ English lucerne (root)
→ English lackluster (root)
→ English lustre (root)
→ English limn (root)
→ English limn (derived)
→ English luster (root)
→ English lunatic (root)
→ English illustrious (derived)
→ English luminary (derived)
→ English leucodermic (root)
→ English lucubrate (root)
→ English lown (derived)
→ English leam (derived)
→ English leuko- (root)
→ English lumination (derived)
→ Old English leoma (derived)
→ Old English liehtan (derived)
→ Old English leoht (mention)
→ Old English leoht (derived)
→ Baluchi روچ (derived)
→ Breton loar (mention)
→ Breton gouloù (inherited)
→ Catalan llum (mention)
→ Catalan lluna (mention)
→ Catalan lluir (mention)
→ Gaulish leux (derived)
→ Central Kurdish ڕۆژ (mention)
→ Czech luna (derived)
→ Welsh lloer (mention)
→ Welsh lleuad (inherited)
→ Welsh llygad (root)
→ Welsh golau (root)
→ Welsh golau (derived)
→ Welsh goleuni (root)
→ Welsh adolygu (mention)
→ Welsh llosg (mention)
→ Welsh golwg (mention)
→ Welsh goleuo (root)
→ Welsh goleudy (root)
→ Welsh goleuad (root)
→ Welsh adlewyrchu (inherited)
→ Danish lue (mention)
→ German Licht (root)
→ German Licht (inherited)
→ German licht (derived)
→ Middle Dutch licht (root)
→ Middle Dutch licht (derived)
→ Middle Dutch licht (root)
→ Middle Dutch licht (derived)
→ Greek λευκός (derived)
→ Middle English light (mention)
→ Esperanto luno (mention)
→ Spanish luz (mention)
→ Spanish luna (derived)
→ Spanish lucir (mention)