| indefiniteness(noun, uncertainty, obscurity, vagueness, abstruseness) |
| objection(noun, issue, dislike, disagreement, question) |
| oppose(verb, decline, reject, dispute, refuse) |
| uneasiness(noun, upset, trouble, worry, concern) |
| ambiguousness |
| be dubious(verb, expression, idiom, dispute, challenge) |
| be uncertain(verb, dispute, challenge, question, suspect) |
| disagree(verb, decline, reject, oppose, refuse) |
| discount(verb, disregard, ignore, question, overlook) |
| enigma(issue, question, uncertainty, subject, problem) |
| faltering(noun, feeling, delay, anxiety, weakness) |
| foreboding(noun, trouble, worry, concern, distress) |
| have reservations(verb, expression, question, suspect, distrust) |
| hazard |
| haziness(noun, uncertainty, vagueness) |
| insecurity(noun, anxiety, confusion, shame, uncertainty) |
| misgive(verb, dispute, challenge, question, suspect) |
| oppugn |
| ponder(activity, pause, hesitate, falter, balk) |
| repudiate(verb, decline, reject, refuse, renounce) |