This is the 10613th most frequent French word.
maîtriser
To master or to control.
Used to indicate control over circumstances.
Elle a réussi à maîtriser la situation difficile.
She managed to control the difficult situation.
Used to signify acquiring proficiency in a skill.
Il veut maîtriser une nouvelle compétence cette année.
He wants to master a new skill this year.
Used to express achieving a deep understanding or mastery of a subject.