stepsister
US /ˈstepˌsɪs.tɚ/
UK /ˈstepˌsɪs.tɚ/

1.
kakak tiri, adik tiri
a daughter of one's step-parent by a previous marriage
:
•
My stepsister and I get along really well.
Saya dan kakak tiri saya sangat akrab.
•
She introduced her stepsister to the family.
Dia memperkenalkan kakak tirinya kepada keluarga.