unpredictable
adjective uk/ˌʌn.prɪˈdɪk.tə.bəl/ us/ˌʌn.prɪˈdɪk.tə.bəl/
B2 变幻莫测的；难以预见的，无法预测的
likely to change suddenly and without reason and therefore not able to be predicted (= expected before it happens) or depended on
The weather there can be unpredictable - one minute it's blue skies and the next minute it's pouring rain. 那儿的天气有点儿变幻莫测—— 一会儿晴空万里，一会儿又大雨倾盆。
The hours in this job are very unpredictable - you sometimes have to work late at very short notice. 这份工作的时间非常不固定——有时突然接到通知就得工作到很晚。
- More examples
- She's very unpredictable so there's no knowing how she'll react to the news.
- Unfortunately the outcome of this kind of treatment can be rather unpredictable.
- He's fun to be with but can be a bit unpredictable at times, you never know what kind of mood he's going to be in.
- I really enjoy having a holiday in the UK, if only the weather weren't so unpredictable.
- The finishing time is a bit unpredictable, it depends how things go.