Thanks for the message.
I can see that there are many occurrences of the word “schliessen” in avast! resources (in various forms - einschliessen, ausschliessen, …, or simply schliessen). Should the word always be written with ß?
Thanks!
Yes, these words always with ß.
German words are very strange. So the difference between ss or ß is that ß is only in long spoken word (long vowel) or after a diphtong (i dont know the english word for it).