This is the 11496th most frequent French word.
revendiquant
"Revendiquant" means "claiming" or "demanding."
In this sentence, 'revendiquant' is used as a present participle to describe the action of claiming alongside writing the letter.
Il écrit une lettre, revendiquant ses droits.
He writes a letter, claiming his rights.
Here, 'revendiquant' expresses the act of demanding during the workers' protest in the street.
Les travailleurs sont dans la rue, revendiquant de meilleures conditions de travail.
The workers are in the street, demanding better working conditions.
'Revendiquant' here is used to depict the act of advocating or demanding changes while speaking to the crowd.