This is the 3221st most frequent French word.
rondelle
A "rondelle" is a slice or washer, often circular in shape.
The word 'rondelle' refers to a circular slice or disk of a fruit or vegetable.
Je vais ajouter une rondelle de citron à ton verre d'eau.
I will add a slice of lemon to your glass of water.
Here, 'rondelle' is used to denote a washer, a thin circular piece often used in construction.
Pour réparer l'étagère, il faut serrer les vis avec une rondelle.
To fix the shelf, you need to tighten the screws with a washer.
In this context, 'rondelle' means a puck, used in hockey as a flat disk.