unpredictable

Từ điển Oxford Advanced Learner 8th

un·pre·dict·able AW [unpredictability unpredictable unpredictably] BrE [ˌʌnprɪˈdɪktəbl] NAmE [ˌʌnprɪˈdɪktəbl] adjective
1. that cannot be predicted because it changes a lot or depends on too many different things
•unpredictable weather
•The result is entirely unpredictable.
2. if a person is unpredictable, you cannot predict how they will behave in a particular situation
Opp: ↑predictable
Derived Words: ↑unpredictability ▪ ↑unpredictably

Example Bank:
•Her behaviour became so unpredictable when she had been drinking.
•No-one knows where they stand with him; he is utterly unpredictable.
•Role play trains students to deal with the unpredictable nature of language.
•The unpredictable weather in the mountains can make climbing extremely hazardous.