This is the 4746th most frequent French word.
protestation
A formal declaration of objection or dissent.
Here, 'protestation' is used to mean 'a formal expression of opposition or dissent'.
Sa protestation contre l'injustice était passionnée.
Her protest against injustice was passionate.
In this sentence, 'protestation' is employed to mean 'assertions or declarations, often of a state or feeling'.
Il a fait des protestations d'innocence.
He made declarations of innocence.
In this usage, 'protestations' refers to 'acts of public expression or demonstration against a cause or issue'.