This is the 4933rd most frequent French word.
serment
Oath or solemn promise.
The word 'serment' refers to a formal and solemn promise or oath, often made publicly or as a formal declaration of loyalty or commitment.
Il a prononcé un serment de fidélité envers son pays.
He took an oath of allegiance to his country.
Here, 'serment' is used in the context of a legal proceeding, signifying a solemn declaration to speak the truth.
Les témoins ont prêté serment avant de témoigner au tribunal.
The witnesses took an oath before testifying in court.
In this sentence, 'serment' is used to describe a promise made in a ceremonial or formal occasion to undertake actions driven by moral or ethical considerations.