| backstairs(adjective, mysterious, private, reticent, taciturn) |
| behind-the-scenes(adjective, secret, background) |
| behind the veil(expression, idiom) |
| birdbrained(adjective, innocent, thick, unfamiliar, unconscious) |
| blind to(expression, adjective, innocent, unfamiliar, unconscious) |
| buttoned up(expression, adjective, mysterious, reticent, taciturn) |
| by night |
| cagey(mysterious, private, reticent, taciturn, covert) |
| caught napping(expression, adjective, ignorant, unaware, uneducated) |
| clammed up(expression, adjective, mysterious, reticent, taciturn) |
| close(obscure, dark, reticent, unknown, taciturn) |
| close-mouthed(mysterious, private, reticent, taciturn, uncommunicative) |
| clouded(obscure, dark, secret, unknown, hidden) |
| confused |
| covert(mysterious, private, reticent, unknown, taciturn) |
| covertly |
| cretinous(adjective, innocent, thick, unfamiliar, unconscious) |
| cryptic(obscure, dark, reticent, unknown, taciturn) |
| darkling |
| dense(adjective, innocent, thick, unfamiliar, unconscious) |