I'm really under the gun to provide a good example sentence.
Let's go under the overpass and then over the underpass.
i am playing under the tree.
work
i was under time because i was late
Jason will be hiding under the bed tonight.
I am not writing a sentence using that word.
The bench under the tree was shaded by it's leaves.
I just removed three burrs from under my saddle.
I ate a corncob in under five minutes. There you go.
a sentence using the word endotracheal
This is a sentence using the word aviator.
this is a sentence using the word armchair.
I am saying a sentence using the word collagen.