実兄

1. Origins, structure, and basic meaning

• Structure: 実兄 is read as じっけい and means an older biological brother.
• Basic usage: It can refer to the speaker’s older brother or specify another person’s older biological brother.

2. Common pitfalls and similar expressions

• The speaker’s older brother
  • 実兄が手伝ってくれた says that the speaker’s older brother helped with packing. Example: 実兄が引っ越しの荷造りを手伝ってくれた。
• Another person’s older brother
  • 彼の実兄 identifies his older biological brother, who runs a shop in the same town. Example: 彼の実兄は同じ町で小さな店を営んでいる。