This is the 399th most frequent Russian word.
сказать
"Сказать" means "to say" or "to tell."
In this sentence, 'сказала' is used in the past tense, third-person singular to report indirect speech.
Она сказала, что придет позже.
She said she would come later.
The verb 'сказать' is in the infinitive here, forming part of an imperative request to be allowed to speak.
Дайте мне сказать!
Let me speak!
Here, 'сказать' is used in the infinitive form as part of the phrase 'хочу сказать', meaning 'I want to say.' This illustrates intention or desire to speak.