Let's break down the issue and give you some correct options:
* "Ihre" is the possessive pronoun "your" in the feminine form. It needs a noun after it to be grammatically correct.
* "Erstaunlich" means "amazing" or "astonishing." It's an adjective.
Here's how you can use these words correctly in German:
1. "Ihre erstaunliche Leistung" - "Your amazing performance" (feminine noun)
2. "Ihr erstaunlicher Erfolg" - "Your amazing success" (masculine noun)
3. "Ihre erstaunlichen Ideen" - "Your amazing ideas" (plural noun)
4. "Das ist erstaunlich!" - "That's amazing!" (using the adjective directly)
Do you have a specific context in mind? I can help you choose the correct phrase!