弟兄姊妹

dìxiōngzǐmèi
  1. (Christianity) brothers and sisters (in Christ)
  2. brothers and sisters (in Christ)

Wiktionary

Entry Composition

1 弟兄 dìxiong
  1. brothers
  2. comrade
2 姊妹 zǐmèi
  1. (older and younger) sisters
  2. sister (school, city etc)