- intrinsic, intrinsical - belonging to a thing by its very nature; "form was treated as something intrinsic, as the very essence of the thing"- John Dewey
Antonyms: extrinsic, accidental, adventitious, adscititious, alien, foreign, external, outside, extraneous
- intrinsic - situated within or belonging solely to the organ or body part on which it acts; "intrinsic muscles"
Antonym: external (indirect, via internal)