built-in

adjective
1
included as part of something and not separate from it
درون‌ساخته, یکپارچه, توکار, از پیش تعبیه‌شده, سرخود
compare inbuilt
2
existing as an essential part of something
ذاتی, توکار, بنیادی, درونی
The system has a built-in resistance to change.