The girl was persistently late for school.
The dog persistently barked for no reason.
Persistently crying only made the boy's parents ignore him.
He was unwilling to buy what the street vendor was persistently trying to sell him.
The children persistently asked for ice cream.
To besmirch something or someone is to tarnish their reputation. An example of a sentence using the word "besmirch" is "The editor of the newspaper was persistently attempting to besmirch the mayor. "
The alarm clock buzzed persistantly, despite my attempts to turn it off.
To torment someone is to persistently cause them pain, whether emotional or physical. (This word can be a noun, or it can be a verb.) Example: Some myths say that when evil people die, they will face endless torment in Hell.
I am not writing a sentence using that word.
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.