This is the 679th most frequent Czech word.
napsala
"She wrote."
In this sentence, the word "napsala" is used in the past tense and indicates the action of writing a book that Marie completed.
Marie napsala knihu o historii Československa.
Marie wrote a book about the history of Czechoslovakia.
Here, "napsala" refers to the specific past action of her writing a letter, emphasizing the completion of the act.
Včera večer, napsala dopis svému příteli.
Yesterday evening, she wrote a letter to her friend.
In this case, "napsala" is used in a subjunctive clause to describe the action of writing a story as a required objective or outcome.