| fly-by-night(uncertain, doubtful, unsure) |
| foolish(adjective, stupid, senseless, irrational, arbitrary) |
| for the birds(expression, idiom, extraordinary, amazing, unlikely) |
| from abroad(expression, experience, distant, different, unfamiliar) |
| full of holes(expression, idiom, extraordinary, amazing, unlikely) |
| harebrained(extraordinary, amazing, incredible) |
| hazardous(uncertain, shaky, unclear, unlikely, questionable) |
| hazy(uncertain, shaky, unclear, unlikely, questionable) |
| hesitant(uncertain, doubtful, unsure) |
| hundred-to-one(doubtful, unlikely, implausible) |
| iffy(uncertain, doubtful, shaky, unclear, unlikely) |
| illusory(adjective, fantastic, imaginary, unlikely, unbelievable) |
| immigrant(experience, distant, different, unfamiliar, external) |
| imported(experience, distant, different, unfamiliar, external) |
| impugnable(uncertain, shaky, unclear, unlikely, questionable) |
| inaccessible(experience, distant, different, unfamiliar, external) |
| incogitable(extraordinary, amazing, absurd, implausible, preposterous) |
| inconclusive(uncertain, shaky, unclear, unlikely, questionable) |
| indecisive(uncertain, doubtful, unclear, unsure, questionable) |
| indefinite(uncertain, shaky, unclear, unlikely, questionable) |