The phrase "extremely intimidating" is correct and usable in written English.
You can use it to describe a situation that is particularly intimidating. For example: "The storm clouds were rolling in, and the thunder was extremely intimidating."
Acting next to them is extremely intimidating.
It was extremely intimidating and infuriating.
This system would provide an extremely intimidating and highly effective defense against Iran and North Korea, but would pose no threat to Russia or China.
When I look at footage of him, the voice, the command of the stage – it is extremely intimidating to walk up to".
"I know it was extremely intimidating for me and this other alternative form allows candidates to shine in a different way".
Another witness, Matthew Kelcher, said: "Even with the confidence of a free-born Englishman who knows he has nothing to hide, I found this whole experience to be extremely intimidating.
She said that she had been pressured to continue an affair with him; in the beginning, "I was extremely intimidated by him.
As a newly ruthless defender of my property - but, as yet, without the air rifle I am so longing to own - I challenge anyone to come and have a go if they think they're hard enough, but a word of warning: to the arms cache by the back door I have now added a mallet, a potato masher and an extremely intimidating-looking shoehorn.
It was extremely terrifying, it was intimidating, it was depressing.
She is extremely bright without being intimidating; she is tough while being compassionate; and she has the deepest of integrity.
It is undeniably intimidating, even if individually delegates are extremely welcoming.
