〜系(けい)

けい
suffix
-type; -style; of ~ descent (suffix)
abstract
1. -type; -style; -system; of ~ descent
Attaches to nouns to indicate type, lineage, or category. Used for ethnic/national descent, family lines, scientific systems, and stylistic categories of fashion, music, or character.
彼女(かのじょ)は理(り)系(けい)だ。
She's a science major.
I studied the history of African Americans.
Lately I often listen to relaxing-style music.

Attaches to a noun to mark category, lineage, or style. Highly productive in casual classification of people, fashion, music, food, and academic fields.

Compounds

Usage

With descent words (日本(にほん)系(けい), アフリカ系(けい)), often combined with a nationality: アフリカ系(けい)アメリカ人(じん) (African American). In casual speech, ~系(けい)女子(じょし) or ~系(けい)男子(だんし) classifies personality or fashion type.