It is of utmost importance to understand what plagiarism is when attempting to provide the quintessential answer.
"Quintessential" is an adjective that describes the perfect example of a particular type, The quintessential quarterback would be one who has all of the traits and qualities those who are knowledgeable about football would expect from a quarterback. There are quintessential villains and heroes. It could be that "quintessential" is generally used to describe people, but that may not be necessarily true.
That photograph caught a quintessential moment in our nation's hsitory.
Beyond our solar system, the heavens are made up of only quintessential elements.
No the word quintessential is not a noun. It is an adjective.
Her comportment throughout the ordeal displayed a quintessential bravery.
The quintessential ingredient in cake is flour.
Jacqueline Kennedy's poise, grace and class made her the quintessential first lady.
by adjective in the sentence
In a sentence.
NO but in the sentence "Use of the word "in" as an adjective is IN these days" the IN is an adjective
An adjective describes a noun.
'He was a worried boy.' In this sentence worried is describing the boy, therefore worried is an adjective.