同どう母ぼ姉し

noun

sisters of the same mother; uterine sisters

Refers to sisters who share the same mother, often used in contexts distinguishing full siblings from half-siblings.

• 彼かの女じょたちは同どう母ぼ姉しで、とても仲なかが良よい。

  They are sisters of the same mother and get along very well.