Translation:The guard did not sleep.
'avwI' doesn't have a translation shown. Just thought I'd point that out.
The Duolingo software is unable to look up the hints for words that start with apostrophes. It's a known problem and on the list for the programmers to fix, but low priority for the company, so there is no telling if it will ever get fixed.
If you would like to read about more of the known issues keeping us in beta, go to https://forum.duolingo.com/comment/26778885