It must have been a frightening sight for them to watch.
Is bungee jumping frightening or fun?
1. It was the most frightening experience. / 2. It's surprising how frightening things attract us.
Thunder has been explained scientifically, and people no longer believe it is a sign that the gods are angry with them, so thunder, too, is a little less frightening.
In contrast to his frightening looks, his voice was kind and calm.
Fires are less frightening today than they once were, because more and more houses are built of concrete, and concrete houses do not burn as easily as the old wooden ones.
There is nothing frightening about a normal, natural death, the death of a man who has fulfilled himself and lived out his life.
These poles, called totem poles, are thought to have been worshipped or constructed for frightening enemies.
I've never heard of such a frightening story before.
In this way they are too tired to be frightening.
It's frightening to walk through the woods at night
What’s the most frightening film you’ve ever seen?
I so nervous that I find the idea of dancing in front of other people really frightening.
Adverts promoting safe driving are often frightening.