This is the 438th most frequent French word.
mission
A task or duty assigned to achieve a specific goal or purpose.
In this context, 'mission' refers to the overarching goal or purpose of an organization or entity.
La mission de l'organisation est de protéger l'environnement.
The mission of the organization is to protect the environment.
Here, 'mission' signifies a specific task or assignment undertaken, particularly one that involves effort to achieve a particular aim.
Je pars en mission humanitaire la semaine prochaine.
I am leaving on a humanitarian mission next week.
In this instance, 'mission' denotes a specific duty, often confidential or with a particular objective, completed by someone.