Today’s Root:  luminos

light

Word Building:

luminary – a heavenly body as a source of light (sun or moon), someone who has reached the peak in his field.
luminescent – something that emits light
luminescence – the emission of light
luminosity – the degree of brightness; intellectual
luminous – Giving or radiating light.

Sample Sentence:

The financial luminary spoke to the students about the dangers of student debt.