| clouded(obscure, dark, anxious, worried, troubled) |
| covered(obscure, secret, hidden, concealed, unseen) |
| cryptic(obscure, dark, strange, secret, hidden) |
| curious(adjective, strange, new, concealed, untried) |
| desolate(adjective, obscure, strange, mysterious, indefinite) |
| disguised(adjective, obscure, secret, hidden, underground) |
| eclipsed(obscure, dark, secret, hidden, concealed) |
| enigmatic(strange, unclear, indistinct, indistinguishable, inexplicable) |
| exceptional(adjective, obscure, unusual, strange, new) |
| extraordinary(adjective, obscure, strange, new, different) |
| extraterrestrial |
| fantastic(adjective, new, untried) |
| frontier |
| furtive(obscure, strange, clandestine, underground, curious) |
| ignorant(adjective, uninformed, oblivious) |
| incomprehensible |
| indeterminable(adjective, vague, general, unclear, ambiguous) |
| inscrutable |
| isolated(adjective, obscure, new, mysterious, unfamiliar) |
| late(adjective, unusual, cold, strange, fresh) |