This is the 9384th most frequent Turkish word.
zehirlenen
"Zehirlenen" means "poisoned" in English.
Here, 'zehirlenen' describes the state of the dog that has gotten poisoned after consuming something harmful.
Çürümüş meyve yiyen köpek zehirlenen oldu.
The dog that ate the rotten fruit became poisoned.
In this context, 'zehirlenen' functions as an adjective modifying 'food', indicating that the food is the source of poisoning.
Hasta, zehirlenen bir yemeği yanlışlıkla yemişti.
The patient had mistakenly eaten poisoned food.
Here, 'zehirlenen' acts as a descriptive adjective clarifying the state of the students, who have been affected by poison.