belonging to a thing by its very nature

the intrinsic value of a gold ring.

Anatomy . (of certain muscles, nerves, etc.) belonging to or lying within a given part.

adjective

accidental , acquired , extrinsic , incidental , learned

adjective

built-in , central , congenital , connate , constitutional , constitutive , deep-seated , elemental , essential , fundamental , genuine , hereditary , inbred , indwelling , inherent , inmost , innate , intimate , material , native , natural , particular , peculiar , real , true , underlying , connatural , inborn , indigenous , ingrained , basic , inner , necessary