challenge (against authority or a higher-ranked person) / (figuratively) try at something

important, significant / grave, solemn

system; institution

朝鮮語: Korean language

importance, significance, seriousness, gravity

(law) a lawyer; an attorney

十代: people from 10-19 years old

to challenge / (figuratively) to take on the challenge of doing something (especially something one has not done before); to try; to try one's hand at

(linguistics) the Korean language (academically or about the North Korean standard)

五十: fifty, 50