operate
The French word 'opérer' is used in a similar way to the English word 'operate'. It is often used in a medical context to mean 'to perform surgery', but can also be used more generally to mean 'to carry out' or 'to function'. For example, one might say 'L'appareil opère correctement' to mean 'The device is functioning correctly'.
The doctors decide to operate tomorrow morning.
In this sentence, 'opérer' is used in the context of a medical procedure. The doctors are making a decision regarding when to perform an operation or surgery.
You must effect a change in mentality.
In this instance, 'opérer' is used to suggest the performance or carrying out of an action. It translates to 'effect' in English, implying the necessity for a mental shift or change.
The police will operate in the conflict zone.
Here, 'opérer' represents the concept of 'operation' in English. The police are planning to execute a mission or maintain a presence in a specific location.