Questions & Answers about היא בעצמה ביקשה מהמלצרית עוד מים.
ביקשה is the past tense, 3rd person feminine singular form of לבקש (to ask for / to request).
It matches היא (she), so the grammar is:
- היא ביקשה = she asked / she requested
Compare:
- הוא ביקש = he asked
- היא ביקשה = she asked
The -ה ending is a very common sign of feminine singular in the past tense.
בעצמה means herself or by herself, but in this sentence it most naturally gives emphasis: she herself.
So היא בעצמה means:
- she herself
- she personally
It highlights that she, and not someone else, made the request.
Also notice the feminine ending:
- בעצמו = himself
- בעצמה = herself
Yes, Hebrew often uses both when it wants to be clear and emphatic.