| obscured(adjective, secret, hidden, underground, concealed) |
| secretive(adjective, dishonest, cunning, deceitful, mysterious) |
| sly(adjective, quiet, dishonest, cunning, deceitful) |
| stealth(noun, adjective, secret, hidden, spy) |
| under an eclipse(expression, idiom, concealment) |
| esoteric(secret, unknown, hidden, underground, concealed) |
| in ambush(expression, idiom, clandestine, underground, undisclosed) |
| in the dark(expression, idiom, reticent, unknown, taciturn) |
| abstruse(secret, unknown, hidden, underground, concealed) |
| clandestinely(adverb, clandestine, secretly, furtively, slyly) |
| cloaked(obscure, secret, unknown, hidden, clandestine) |
| close(mysterious, private, reticent, unknown, hidden) |
| closet(noun, adjective, secret, sly, clandestine) |
| covered(obscure, secret, unknown, hidden, concealed) |
| creep(adjective, secret, hidden, spy, covert) |
| cryptic(adjective, mysterious, private, reticent, unknown) |
| disorderly |
| feline(mysterious, private, reticent, taciturn, covert) |
| hush hush(expression, idiom) |
| in a cloud(expression, idiom, concealment) |