You would normally use it as a descriptive word for something that is intimidating.
Example
The beast had proven to be quite a formidable opponent, single handedly taking down three warriors in one attack.
Formidable - hard to overcome; hard to deal with. Sentence: A long final examination is more formidable than a short test. Formidable can also refer to an opponent, enemy, etc., such as one who is hard to beat.
Just use it! Or do you mean, can you use the word beheld in a sentence.
How do you use the word decibel in a sentence?What is decibel used for?
the word rag in a sentence
use the word "an" in a sentence
we will make a formidable team
There are several ways to use formidable in a sentence. One sentence for formidable is; Walking on coals is a formidable challenge for anyone.
the wind was formidable last night.
He was a formidable opponent.
formidable: difficult to overcome
Jim was overwhelmed by the formidable task of completing his English homework before the Reds game.
It is spelled formidable. Despite being the current champion, Punchy Pete knew that his next opponent would be a formidable adversary.
Sam found long division to be a formidable challenge. (here the word means tough)
The formidable hurricane lasted for three days and let the village in ruins. The child believed there was a formidable monster under the bed.
Sure: The stench of the floater in the toilet was a formidable odor preventing me from entering the campground restroom.
Formidable is an adjective that describes someone or something who inspires fear, awe or impressiveness. This word used in a sentence might look like the following, " As they stood at the base of K2, staring up at the formidable mountain, the group felt inspired to reach the summit."
"Chicago's Boss Daley controlled one of the most formidable political machines the nation had ever seen."