In a manner that is typical or characteristic of a thing's nature.(adverb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "quintessentially" in a sentence
"Dressed in an elegant gray suit, de la Renta talked about fashion and Obama, whom he describes as quintessentially modern."
"The Tiger Mother, aka Yale Law School professor Amy Chua, sought to assure her children's success in a way that she described as quintessentially Asian: She pushed, bullied and at times insulted them into achieving."
"We asked a number of people at this high-profile church, widely identified as quintessentially evangelical, how they described their religious affiliation."