extremely bad or shocking
horrendous - awful
Something ‘horrendous’ is so dreadfully unpleasant that it causes great fear and distress, or, in the context of a mistake, significant repercussions. It is typically used to express situations for which the word ‘bad’ simply isn’t strong enough, though you may also frequently encounter it being used for dramatic effect.
The investigator said that the crime scene was absolutely horrendous. It really traumatized her.
Kevin has really struggled to lead and motivate his team. In truth, he has performed horrendously.
The traffic was horrendous this morning. I thought I’d never make it into work!