nurse
The French word 'infirmière' translates to 'nurse' in English. It is used to refer to a healthcare professional in a similar way we use 'nurse' in English. For example, 'Ma sœur est une infirmière' means, 'My sister is a nurse'.
The nurse gives medications to patients.
This sentence uses the term 'infirmière' to indicate a job role that is providing a service, notably administering medications. In this context, 'infirmière' is translated as 'nurse'.
My friend is a nurse.
In this case, 'infirmière' is used to describe someone's profession. The word 'une' before 'infirmière' is an indefinite article, and can be translated as 'a' in English. Otherwise, the literal translation is 'My friend is a nurse'.
The nurse said I can go home.
In this sentence, 'infirmière' is used to identify the person who gave the speaker the information. In English, the translation is 'The nurse said I can go home'.