Questions & Answers about Žena se želi udati.
Žena is in the nominative singular because it is the subject of the sentence.
A useful extra point: žena can mean both woman and wife, depending on context. In this sentence, it is normally understood as woman.
Želi is the 3rd person singular present tense of željeti, which means to want.
So:
- ja želim = I want
- ti želiš = you want
- on/ona želi = he/she wants
Here it matches žena, which is singular:
- Žena želi... = The woman wants...
Se is there because the verb is udati se.
In Croatian, udati se is the normal verb meaning for a woman to get married / marry. The se is not optional here; it is part of the verb expression.
So learners should think of it as a whole item:
- udati se = to get married (said of a woman)
It does not literally mean that she is doing the action to herself in the English sense. It is just how this verb is formed.