It's unlikely that anyone will ever answer your question
The likelihood of a car accident is unlikely.
The idea was so preposterous it was unlikely to have been invented.
It has both.The word unlikely is an adjective and the word very is an adverb modifying unlikely.
I am not writing a sentence using that word.
I can give you a sentence using the word galaxy.
A synonym for unlikely is doubtful. Now when you are creating a sentence such as; It is unlikely you will remember to do your homework. Replace unlikely with doubtful now you have, I am doubtful that you will remember to do your homework. This should help you understand the meaning of unlikely.
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.
Need a sentence using the word crater?