Here are some examples of words derived from this root:
* Lucent (adj.) - giving off light
* Lucidity (n.) - clearness of thought or expression
* Lucid (adj.) - easy to understand, clear
* Translucent (adj.) - allowing light to pass through
* Luminous (adj.) - emitting light
* Illuminate (v.) - to light up
* Elucidate (v.) - to make clear or understandable