Disciples in the same sect are called (martial) brothers and sisters.

In martial sects and similar organizations, younger disciples often directly apprentice themselves to an elder. The relationship between Master and Apprentice is deep, akin to Parent-and-Child… and the terms of address within a sect reflect this.
Da Shixiong - Eldest senior brother
Shidi - Junior martial brother
Shifu/Shizun - Master
Shishu - Martial Uncle
Final/closing disciple - the last disciple a master will ever accept in his life
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