1. (a.) Further in; interior; internal; not outward; as, an spirit or its phenomena.

2. (a.) Not obvious or easily discovered; obscure.

absolute central certain close concealed concrete constitutional deep deep-seated defined definite detailed determinate different distinct distinguished esoteric especial essential exceptional express extraordinary familiar fixed focal gut hidden immanent implanted implicit inalienable individual indoor indwelling infixed ingrained inherent inmost innermost inside interior internal intestine intimate intrinsic inward inwrought irreducible middle minute noteworthy nuclear particular personal precise private resident respective secret several singular solipsistic special specific subjective unalienable unchallengeable unquestionable visceral