| recess(noun, middle, interior, lining, insides) |
| restricted(adjective, secret, private, clandestine, underground) |
| subjective(adjective, interior, inner, internal, within) |
| unrevealed(adjective, individual, essential, private, mental) |
| auricular(adjective, show) |
| axis(noun, center, middle, target) |
| belly(noun, heart, core, middle, interior) |
| centrality(noun, center, middle, target) |
| centriole(noun, center, middle, target) |
| centrum(noun, center, middle, target) |
| classified(adjective, intimate, secret, private, personal) |
| closet(adjective, special, intimate, secret, private) |
| cynosure(noun, center, middle, target) |
| deep-rooted(adjective, private, mental, inner) |
| deep-seated(adjective, private, mental, inner) |
| deep down(verb, expression, adverb, phrasal verb, secretly) |
| emotional(adjective, private, mental, inner) |
| equidistance(noun, center, middle, target) |
| essence(noun, center, middle, target) |
| essential(adjective, private, mental, inner) |