This is the 3227th most frequent Portuguese word.
desaparecido
Missing; disappeared.
In this sentence, 'desaparecido' is used as an adjective to describe the condition of the dog being missing or vanished.
O cachorro está desaparecido há dias.
The dog has been missing for days.
Here, 'desaparecido' acts as a past participle adjective, modifying 'anel' to indicate it was lost or not located until found.
Ela encontrou o anel que estava desaparecido.
She found the ring that was missing.
In this instance, 'desaparecido' characterizes the man described, showing he is missing or unaccounted for.