I took an umbrella with me as the angry clouds were threatening rain.
Yes."Threatening to kill, he quickly advanced forward."
i threatened her to get into the van.
The threatening dog stood in the path, baring its teeth.
"Mum always curtails my moaning by threatening to ground me."
This animal is a threatened species or they threatened my life.
He had a life-threatening illness.
You just used the word acolytes in a sentence. Even saying, "can the word acolytes be used in a sentence", you are using that word in a sentence.
The word "incidentally" can be used at the end of a sentence. You can make the sentence "This was done incidentally.".
Her threatening demeanor made me decide to change the subject.
You just used it in a sentence.
This is your umpteenth request for a word to be used in a sentence.
The sky was overcast with dark clouds, threatening to bring rain at any moment.