This is the 10064th most frequent French word.
gratter
"Gratter" means "to scratch" or "to scrape."
In this sentence, 'gratter' is used to describe the action of playing a stringed instrument by strumming.
Je gratte la guitare chaque soir.
I strum the guitar every evening.
Here, 'gratter' is used in the sense of scraping or scratching a surface.
Il a dû gratter le mur pour enlever la vieille peinture.
He had to scrape the wall to remove the old paint.
In this instance, 'gratter' means to scratch, referring to the act of moving one's fingernails over the skin.