This is the 708th most frequent Portuguese word.
perdeu
"Perdeu" means "lost" in English.
In this sentence, "perdeu" is the past tense of "perder," meaning "lost." It is used to indicate that he misplaced the keys.
Ele perdeu as chaves.
He lost the keys.
Here, "perdeu" describes the team losing a competition or game, again in the past tense.
O time perdeu a partida.
The team lost the match.
In this context, "perdeu" refers to a figurative loss, describing losing patience or temper in the past.