obstinate

adjective
1
refusing to change your opinions, way of behaving, etc. when other people try to persuade you to; showing this
لجوج, سرسخت, یک‌دنده, لجباز, کله‌شق
synonym stubborn
2
difficult to get rid of or deal with
سمج, دشوار
the obstinate problem of unemployment
an obstinate stain
synonym stubborn