Impenetrable- The fort's defenses were thought to be impenetrable.
a sentence using the word endotracheal
I am saying a sentence using the word collagen.
this is a sentence using the word armchair.
Please type a sentence using the word assertion.
That is a sentence using the word troops.
His shield was made of an impenetrable material.
The fortress walls were impenetrable, standing strong against any attempts of intrusion.
The man had impenetrable metal skin, incapable of being pierced.
Around six o'clock, I'll have a great answer for you. Around the fort, our cordon was impenetrable.
I am not writing a sentence using that word.
The professor's heavy accent made the substance of his lecture nearly impenetrable.
I can give you a sentence using the word galaxy.
a sentence using the word endotracheal
This is a sentence using the word aviator.
I am saying a sentence using the word collagen.
This is a sentence using the word monomer. :P
this is a sentence using the word armchair.