This is the 2188th most frequent French word.
deviennent
"Deviennent" means "become" (third person plural of the verb "devenir").
In this sentence, 'deviennent' is used as the third-person plural form of the verb 'devenir,' meaning 'to become.' It describes a transformation or a change over time.
Les enfants deviennent sages avec le temps.
Children become wise with time.
In this context, 'deviennent' indicates a physical change in appearance of the plants. It is again the third-person plural form of 'devenir.'
Ces plantes deviennent sombres en mûrissant.
These plants turn dark as they ripen.
Here, 'deviennent' is used to signify a cognitive change, showing the transition from abstractness to clarity after thought.