unpredictable
🇺🇸
/ˌʌnprɪˈdɪktəbl/
🇬🇧
/ˌʌnprɪˈdɪktəbl/
adjective
R
Not able to be known in advance because it changes often or depends on many things.
The weather is unpredictable, so always carry an umbrella just in case.
天气变化莫测，所以总是带把伞以防万一。
R
A person whose actions or behavior cannot be guessed beforehand.
He is so unpredictable that you never know how he will react.
他如此难以捉摸，你永远不知道他会如何反应。
translation
不可预测, 难以捉摸