How the word "erstaunlich" is translated into English
Dein Fortschritt ist wirklich erstaunlich!
[ˈdaɪ̯n ˈfɔrtʃrɪt ˈɪst ˈvɪrklɪç ɛɐ̯ˈʃtaʊ̯nlɪç!]
Your progress is really amazing!
Du hast erstaunlich schnell Deutsch gelernt.
[ˈduː ˈhast ɛɐ̯ˈʃtaʊ̯nlɪç ˈʃnɛl ˈdɔɪ̯tʃ ɡəˈlɛrnt.]
You learned German amazingly quickly.
Das war eine erstaunliche Leistung von dir.
[das ˈvaːɐ̯ ˈaɪ̯nə ɛɐ̯ˈʃtaʊ̯nlɪçə ˈlaɪ̯stʊŋ ˈfɔn ˈdiːɐ̯.]
That was an amazing achievement on your part.
"erstaunlich" is in the lesson "Praises" (Level 36), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.