This is the 11041st most frequent Spanish word.
dormido
Asleep.
Here, 'dormido' is used as a past participle in a reflexive construction ('quedarse dormido') meaning 'to fall asleep'.
Después de un día largo, Juan se quedó dormido en el sofá.
After a long day, Juan fell asleep on the couch.
In this sentence, 'dormido' functions as an adjective, describing the state of the dog as 'being asleep'.
El perro está dormido en su cama.
The dog is asleep on its bed.
Here, 'dormido' is used as an adjective placed after the noun ('gato') to describe its state as 'asleep'.