"Una clase importante."

Translation: An important class.

[ShabnamB]

Why is clase a feminine noun? Usually nouns ending with -a are feminine right?

[AVAX3M]

I don't know exactly why but like many other languages, it's all about etymology (roots/origin(s) of the word) and usage. And as you said yourself nouns ending with -a are usually feminine. Keyword: usually. In other words, not all nouns ending with -a are feminine and not all feminine nouns end with -a.

masculine: un/el clima, problema, día

feminine: una/la canción, universidad, nube

[forgotbouthisacc]

Spanish is such a beautiful language! This is a great app btw!! :)