| in the background(expression, idiom, mysterious, reticent, taciturn) |
| in the dark(expression, idiom, mysterious, reticent, taciturn) |
| in the know(expression, adjective, idiom, smooth, keen) |
| incredulous(wary, mistrustful, distrustful) |
| inside(sharp, smart, intelligent, clever, astute) |
| intriguing(mean, smooth, smart, cunning, clever) |
| jazzed(sharp, bright, lively, active, careful) |
| jealous(suspicious, wary, mistrustful, distrustful) |
| know all the answers(expression, adjective, idiom, careful, cautious) |
| know ins and outs(expression, adjective, idiom, careful, cautious) |
| knowledgeable(smart, bright, careful, intelligent, wise) |
| like a clam(expression, idiom, cautious, tactful, circumspect) |
| lively(sharp, bright, active, alert, aware) |
| malingering |
| misleading(adjective, vague, deceitful, mysterious, subtle) |
| moderate(cautious, tactful, circumspect) |
| nimble-witted(smart, shrewd, clever, subtle, artful) |
| noncommittal(adjective, restrained, hesitant, reserved, cautious) |
| not rash(expression, cautious, tactful, circumspect) |
| observative(adjective, careful, cautious, aware, attentive) |