na-adjective, noun
second grade; second class; secondary
Used for ranks, levels, or classes in systems such as proficiency tests, licenses, or quality grades. Often appears in compound terms like 二級品 (second-class goods) or 二級建築士 (second-class architect).
彼は日本語能力試験の二級に合格した。
He passed the second level of the Japanese Language Proficiency Test.
この製品は二級品として販売されている。
This product is sold as second-class goods.