NATIONAL HARBOR, MD - MAY 31:  Confetti falls from the ceiling after Karthik Nemmani correctly spelled the word 'koinonia' to win the 91st Scripps National Spelling Bee at the Gaylord National Resort and Convention Center May 31, 2018 in National Harbor, Maryland. Forty one finalists were selected to participate in the final day after a record 516 spellers were officially invited, up from 291 in 2017 .  (Photo by Chip Somodevilla/Getty Images)
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00:10 - Source: CNN
CNN  — 

Karthik Nemmani, a soft-spoken eighth-grader from McKinney, Texas, hadn’t been to the National Spelling Bee before, but he had already been in a battle with 12-year-old Naysa Modi.

In their county spelling bee, Naysa won, but Thursday, Karthik came out on top – successfully navigating through words like “aver,” “paucispiral,” “ankyloglossia,” “haecceitas” and finally “koinonia” to win the Scripps National Spelling Bee.

The Greek word “koinonia” – most commonly pronounced “koy-nuh-NEE-uh” – is defined as “intimate spiritual communion and participative sharing in a common religious commitment and spiritual community.”

When asked whether having Naysa, who is from Frisco, and other friends at the national finals helped, the unassuming Karthik said: “Yeah, I guess.”

He smiled, and added, “I guess it gave me a little more confidence.”

When asked at what point he knew he could spell the winning word, the 14-year-old said to laughter: “When I heard it.”

Spellers typically ask for clues such as language of origin, alternate pronunciations and what part of speech the word is.

Naysa, who prepared her answers by miming as though typing on a keyboard, finished second after incorrectly spelling “Bewusstseinslage,” leaving out the second S.

Thursday’s finals went 18 rounds.

Karthik wins $40,000 in cash, a trophy, encyclopedias and $2,500 savings bond.

Naysa Modi smiles during one of the early rounds.

There was a cute moment in one of the early rounds when 12-year-old Simone Kaplan of Davie, Florida, missed on the spelling of “carmanole.”

When she heard the correct spelling she said, in a soft voice, “OK, bye. And good luck to the rest of you.”

Atman Balakrishnan, the 12-year-old son of 1985 champion Balu Natarajan, didn’t advance to the finals.

This year’s Scripps National Spelling Bee, which took place in Oxon Hill, Maryland, featured the largest number of competitors – 516 – in its history. They ranged in age from 8 to 15.

Contestants came from every state and a handful of other countries. Enya Hubers of Burlington, Ontario, was among the last 16 spellers.