in-built

adj in-built

• inherent — existing in someone or something as a permanent and inseparable element, quality, or attribute; inhering: an inherent distrust of strangers.
• deep-seated — A deep-seated problem, feeling, or belief is difficult to change because its causes have been there for a long time.
• innate — existing in one from birth; inborn; native: innate musical talent.
• congenital — A congenital disease or medical condition is one that a person has had from birth, but is not inherited.
• constitutional — Constitutional means relating to the constitution of a particular country or organization.