Learn German: Solche Sportwagen beschleunigen unglaublich schnell. - Such sports cars accelerate incredibly fast.

solch- takes the same endings as definite articles (like der, die, das) when it comes directly before a noun. In this sentence, Sportwagen is the plural subject in the nominative case, so solch- takes the plural nominative ending -e, becoming Solche.

The word Sportwagen can mean 'sports car' or 'sports cars'. How can I tell it is plural here?

Two clues give it away! First, the determiner is Solche (plural) instead of Solcher (masculine singular). Second, the verb beschleunigen has the plural -en ending instead of the singular beschleunigt. Nouns ending in -wagen, like der Wagen, do not change their spelling in the plural.

Our lesson mentions so ein- as a more conversational alternative to solch-. Could I use that here?

Not easily! Because ein literally means 'a' or 'an', the phrase so ein- only works for singular nouns. For example, you could say so ein Sportwagen for 'such a sports car'. For plurals like we have in this sentence, the ein has to be dropped. While you might occasionally hear so Sportwagen in very casual speech, solche Sportwagen is the standard and most natural choice for plurals.

How is the word unglaublich formed?