Intrinsic
/ɪn.ˈtɹɪn.zɪk/
noun
A built-in function that is implemented directly by the compiler, without any intermediate call to a library.
An ability possessed by a character and not requiring any external equipment.
“You can acquire the fire-resistance intrinsic by eating dragon meat.”
adjective
Innate, inherent, inseparable from the thing itself, essential.
“the intrinsic merit of an action”
(of a body part) Situated, produced, secreted in, or coming from inside an organ, tissue, muscle or member.