| interred(verb, adjective, underground, confined, imprisoned) |
| hidden(verb, adjective, show, obscure, secret) |
| covert(adjective, show, obscure, secret, hidden) |
| inhumed(verb, adjective, underground, entombed) |
| concealed(verb, adjective, cover, show, obscure) |
| entombed(verb, adjective, underground, interred) |
| underground(adjective, secret, unknown, hidden, concealed) |
| secret(adjective, separate, unknown, hidden, concealed) |
| deep(adjective, obscure, difficult, down, busy) |
| immersed(verb, adjective) |
| absorbed(verb, adjective, deep, busy, occupied) |
| sunken(adjective, depressed, hidden, underground, covered) |
| forgotten(adjective, out, lost, gone, abandoned) |
| obscured(verb, adjective, show, obscure, secret) |
| ulterior(adjective, cover, show, obscure, secret) |
| abstract |
| abysmal(difficult, bottomless) |
| cloaked(verb, adjective, secret, unknown, hidden) |
| engaged(verb, adjective, lively, active, busy) |
| engrossed(verb, adjective, active, busy, occupied) |