luminary – a person who inspires or influences others
(Pronounced loo-muh-nair-ee)
To remember the definition of the word luminary, use the following mnemonic:
She was a luminous and scary (luminary) person but actually she was inspiring and influential to others.

Examples of luminary in a sentence
Her breakthrough made her a luminary in the scientific community.
The luminary's speech was met with roaring applause.
He was once considered a luminary, but was now seen as out of touch and irrelevant.