unpredictably

/ˌʌnprɪˈdɪktəbli/
adverb
  1. In a way that cannot be known or guessed in advance; in an unexpected or changeable manner.
    • The river's flow changes unpredictably after heavy rain, making it dangerous for swimmers.
    • She laughed unpredictably at the serious moment, surprising everyone in the room.
    • The stock market has been behaving unpredictably all week, rising and falling without reason.
What does "unpredictably" mean? | whatsthatwordmean | whatsthatwordmean