This is the 4963rd most frequent French word.
souffrent
"Souffrent" means "suffer" (third-person plural of "souffrir").
In this sentence, 'souffrent' is used to describe the experience of plants undergoing hardship due to insufficient light.
Les plantes souffrent du manque de lumière.
The plants suffer from the lack of light.
Here, 'souffrent' is used to indicate a prolonged period of hardship or emotional distress caused by injustice.
Ils souffrent depuis des années à cause de cette injustice.
They have suffered for years because of this injustice.
In this case, 'souffrent' is employed to describe the condition of experiencing anxiety occasionally.