Breakfast – le petit-déjeuner
(Pronounced ptee-deh-zhur-nay)
To remember that Breakfast is pronounced ptee-deh-zhur-nay (petit-déjeuner) in French, use the following mnemonic:
They were having breakfast on the train – but they had a petty argument on the journey (petit-déjeuner).

Breakfast is masculine, so it's le petit-déjeuner. Imagine our early learner ordering breakfast in a café

Examples of petit-déjeuner (breakfast) in a sentence
Le petit-déjeuner est prêt!
(Breakfast is ready!)
Au petit-déjeuner, je mange une tartine.
(For breakfast, I eat toast.)
J'aime le café au petit-déjeuner.
(I like coffee at breakfast.)