uncertain

/ʌnˈsɜrtən/
adjective
  1. Not sure or confident about something; having doubt.
    • She was uncertain whether to accept the job offer.
    • He looked uncertain when asked for directions.
    • I feel uncertain about the results of the experiment.
  2. Not known or definite; likely to change.
    • The weather tomorrow is uncertain, so bring an umbrella just in case.
    • The company's future remains uncertain after the merger fell through.
    • In uncertain times, people often save more money.
  3. Not steady or reliable; hesitant in movement or action.
    • She made an uncertain gesture, not sure if she should wave.
    • His voice was uncertain as he gave the speech.
    • The toddler took a few uncertain steps before sitting down.