This is the 9665th most frequent Portuguese word.
cozinheiro
Cook; a person who prepares food.
Here, 'cozinheira' is used as a feminine noun indicating Maria's aspiration to pursue cooking as a profession.
Maria quer se tornar uma cozinheira profissional e trabalhar em um restaurante famoso.
Maria wants to become a professional cook and work in a famous restaurant.
In this context, 'cozinheiro' denotes an individual with the specific role of cooking, relied upon for expertise and assistance.
Eles precisam de ajuda do cozinheiro para organizar os ingredientes.
They need the cook's help to organize the ingredients.
In this sentence, 'cozinheiro' is used as a noun referring to a person whose profession is cooking.