How to use "frightening" in a sentence

The Nautilus was too strong for it, but it was a very frightening creature!

The Thenardiers wrote her a frightening letter in which they told her that Cosette had no clothes, and that they needed ten francs immediately to buy her a new dress

She had soon left the colourful lights and the happy laughter of the village behind her, and was running down the hill into the frightening darkness of the wood

It was confusing, and a bit frightening.

There was something frightening about that small, dark room

The sun was shining today and the cottage did not look frightening any more

She refused to consider any other possibility because the alternatives were too frightening.

They would nod and smile woodenly and agree that it was a strange and frightening experience, but all the while, they would be thinking that poor old Vivienne was finally getting senile

It ended with the words, 'Although they seem frightening, the Martians have not moved from the pit into which they have fallen, and don't seem able to do so.'

No doubt the Martians were very frightening, but there could not be more than twenty of them against our millions.

At the time we could not understand these things, but later I learnt the meaning of these frightening black hills