This is the 588th most frequent German word.
echte
"Real" or "genuine".
Here, 'echte' describes the noun 'Herausforderung', emphasizing its authenticity or significance.
Dies ist eine echte Herausforderung.
This is a real challenge.
In this sentence, 'echte' qualifies the noun 'Freundin', underlining the genuineness or trustworthiness of the subject.
Sie ist eine echte Freundin.
She is a true friend.
'Echtes' is used here to characterize the noun 'Problem', suggesting its seriousness or importance.