"terrifying environment" is a correct and usable phrase in written English.
It can be used to describe a setting or situation that is frightening or causing fear. Here is an example: "The abandoned house was surrounded by a terrifying environment, with overgrown vines, broken windows, and eerie sounds coming from within."
Instead, they wanted to subject more than 100 animals – sheep, horses, goats, cows, chickens and more – to a terrifying environment with bright lights and 80,000 noisy fans.
At times he was treated as inhuman, and the level of helplessness he must have felt in such a terrifying environment would have been overwhelming.
The report also establishes that many men, rather than being beaten into submission, are coerced into sexual submission by those who seem to offer protection in a gang-ridden and terrifying environment.
The case review concludes that Daniel "must have felt utterly alone and worthless … At times he was treated as inhuman, and the level of helplessness he must have felt in such a terrifying environment would have been overwhelming".
The book, the first of its kind aimed at young adults, is a first-person account of what it is like to be born and raised in a terrifying environment.
And so the nature of their relationship didn't allow me to believe that just when Jack is dumped into a terrifying new environment, needing guidance and knowledge more than ever, Ma would desert him.
The same sense of restraint that makes Firewatch's script timid and overly vague makes its environment terrifying.
Knowing that I'll have to go back into that environment is terrifying.
Swamp monsters are about to take over the White House, and the consequences for the environment are terrifying.
While the initial pitch was all about the business run by Beth Watson and her husband Andy, the mayor of Rangitikei, who despite claiming to have never watched a horror movie have created an environment so terrifying some customers never make it out of their cars.
Individuals need the confidence to keep their minds open to new possibilities, but taking risks in the workplace can be terrifying without a supportive environment.
