舎しゃ弟てい

noun

one's younger brother

Humble or formal term for one's own younger brother, often used in letters or formal speech. Contrasts with 舎兄 (one's elder brother).

See also: 舎兄

• 舎しゃ弟ていは来らい年ねん大だい学がくを卒そつ業ぎょうします。

  My younger brother will graduate from university next year.

noun

sworn younger brother; underling; junior male peer

In yakuza or similar hierarchical groups, refers to a junior member who has sworn loyalty. Also used more broadly for a junior male peer in certain traditional or organizational contexts.

• 彼かれは組くみ長ちょうの舎しゃ弟ていとして、組そ織しきの中なかで重じゅう要ような役やく割わりを担になっている。

  As the boss's sworn younger brother, he plays an important role in the organization.