These terms are pure native Iranian terminology without any Arabization to them
Executive Branch (Administration):
☑️ Iranian Translation: Shākhe Kārandāzi
شاخه کاراندازی
Legislative Branch (Legislature):
☑️ Iranian Translation: Shākhe Dādgozāri
شاخه دادگذاری
Judiciative Branch (Judiciary):
☑️ Iranian Translation: Shākhe Dādgostari
شاخه دادگستری