| in-depth(adjective, intimate, secret, private, penetrating) |
| inborn(adjective, intimate, secret, private, penetrating) |
| inbred(adjective, intimate, secret, private, penetrating) |
| indigenous(adjective, inside, interior, inner, internal) |
| indwelling(adjective, intimate, secret, private, penetrating) |
| ingrained(adjective, intimate, secret, private, penetrating) |
| inmost(adjective, intimate, secret, private, penetrating) |
| innermore(adjective, inside, interior, inner, internal) |
| instinctive(adjective, gut, intuitive) |
| intestine(adjective, inside, interior, inner, internal) |
| intramural(adjective, inside, interior, inner, internal) |
| intuitive(adjective, private, mental, inner) |
| involuntary(adjective, gut, intuitive) |
| municipal(adjective, inside, interior, inner, internal) |
| national(adjective, inside, interior, inner, internal) |
| native(adjective, inside, interior, inner, internal) |
| natural(adjective, gut, intuitive) |
| penetrating(adjective, intimate, secret, private, detailed) |
| personal(adjective, individual, essential, secret, private) |
| privy(adjective, intimate, secret, private, penetrating) |