This is the 14289th most frequent Russian word.
отваренное
"Отваренное" means "boiled" in English.
In this sentence, 'отваренное' is an adjective derived from the verb 'отварить', indicating that the meat has been boiled.
Я ем отваренное мясо каждый день.
I eat boiled meat every day.
Here, 'отваренные' is plural to match 'овощи' and describes the state of the vegetables as having been boiled.
Отваренные овощи полезны для здоровья.
Boiled vegetables are healthy.
In this instance, 'отваренное' is singular, agreeing with 'яйцо', describing the egg as prepared by boiling.