The TTS on this is wrong. (10th April 2015) Försvinna should be pronounced, as usual, with the "sh"/"ʃ" sound as it usually is when there is an r next to an s.
du är rätt!
utalet är dåligt på den här övningen
forvo can do: https://de.forvo.com/word/f%C3%B6rsvinna/#sv
I think "vanish" would be an easier translation to remember.
Vanish is also accepted.
I know. What I meant is that vanish would be a better suggested translation, because of the likeness between the words.
Why is "det" wrong in this sentence?
It's not - either you had some other error, or it's missing.
I was also marked wrong, twice, for putting det instead of den. Then I realised that the lady actually says den.
Ooh, yeah - if it's a "type what you hear" exercise, then it does need to be den. Thanks for pointing that out!
Why could instead of can?
"can" would have been kan rather than kunde.
This made me think of that video of a racoon trying to eat cotton candy but drops it in water instead. 'How could it just disappear?' - was he probably thinking
Why is usage of 'this' unacceptable?
It would be "den här".