This is the 10683rd most frequent French word.
mordant
Biting, caustic, or sharply critical.
Here, 'mordant' means 'biting' or 'sharp,' describing humor that is incisive and witty.
Il a un humour mordant qui fait rire tout le monde.
He has a biting humor that makes everyone laugh.
In this context, 'mordante' signifies sharp or biting critique, indicating an incisive and exacting review.
Sa critique du film était mordante mais pleine de vérités.
Her criticism of the movie was biting but full of truths.
Here, 'mordant' refers to a chemical that fixes dyes onto materials, used in the technical context of fabric dyeing.