This is the 3859th most frequent Portuguese word.
deixou
"Deixou" means "left" or "allowed" in English.
In this sentence, 'deixou' is used to indicate that 'she' placed the key on the table and left it there.
Ela deixou a chave na mesa.
She left the key on the table.
Here, 'deixou' is used to express that 'he' exited or departed the workplace earlier than usual.
Ele deixou o trabalho cedo ontem.
He left work early yesterday.
In this case, 'deixou' conveys a causative meaning, implying that 'that event or situation' caused 'me' to feel happy.