The closing years of her life brought unimaginablehorrors.
Times, Sunday Times (2006)
He works with veterans who have seen unimaginablehorrors, but can't deal with certain horrors of his own.
Times, Sunday Times (2008)
In the process innocent youngsters may be spared unimaginablehorrors.
The Sun (2013)
Definition of 'horror'
horror
(hɒrəʳ, US hɔːr-)Explore 'horror' in the dictionary
countable noun [usually plural]
You can refer to extremely unpleasant or frightening experiences as horrors.
Definition of 'unimaginable'
unimaginable
(ʌnɪmædʒɪnəbəl)Explore 'unimaginable' in the dictionary
adjective
If you describe something as unimaginable, you are emphasizing that it is difficult to imagine or understand properly, because it is not part of people's normal experience.