Beginning/Start – le début
(Pronounced day-bew (second syllable rhymes with "you")
To remember that Beginning/Start is pronounced day-new (début) in French, use the following mnemonic:
They knew it was the beginning of a huge battle the day a bugle (début) was blown.

Debut is masculine, so it's le début. Imagine that at the start of the battle, the little drummer boy is our early learner.

Examples of début (beginning/start) in a sentence
C'est un bon début.
(It's a good start.)
Dès le début, elle savait qu'il gagnerait.
(Right from the beginning, she knew he would win.)
J'ai manqué le début du film.
(I missed the beginning of the movie.)