This is the 755th most frequent Japanese word.
青年
"青年" means "youth" or "young person."
'青年' refers to a young man in this context.
その青年はコーヒーショップで働いています。
That young man works at the coffee shop.
'青年' is used to describe young people collectively.
東京の公園で多くの青年がサッカーを楽しんでいる。
Many young people are enjoying soccer in a park in Tokyo.
'青年' highlights the growth into a mature young adult.