Here are some possible interpretations:
1. "One day yes, I really want to"
This would be a response to someone suggesting something. For example:
* Person A: "Let's go on a trip to the beach!"
* Person B: "Um dia sim, quero muito!" (One day yes, I really want to!)
2. "Sometimes yes, I really want to"
This would suggest the person is open to the idea but not necessarily right now. For example:
* Person A: "Do you ever want to go hiking?"
* Person B: "Um dia sim, quero muito!" (Sometimes yes, I really want to!)
3. "I really want to, but I'm not sure when"
This would express a strong desire but without a clear commitment. For example:
* Person A: "Do you want to learn how to play guitar?"
* Person B: "Um dia sim, quero muito!" (I really want to, but I'm not sure when!)
Need more context:
To understand the true meaning of "um dia sim, quero muito," please provide more context.
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* Who was asking?
* What was the conversation about?
With more information, we can accurately understand the meaning of this phrase.