unpredictable

unpredictable — 形容詞

1. changing so often or so suddenly that you can never guess what will come next

1.形容詞B2
釋義

難以預測

無法預先知道結果或變化的

changing so often or so suddenly that you can never guess what will come next

例句

The mountain weather near Daichi's village is so unpredictable that storms arrive without warning.

Daichi 家鄉的山區天氣非常難以預測，暴風雨常常毫無預警地到來。

so + adj + that clause for result

Tunde's boss is highly unpredictable, and staff never know what tasks will appear on their desks.

Tunde 的主管極難捉摸，員工永遠不知道桌上會出現什麼新任務。

highly + adj for degree

同義詞
  • erratic

    emphasises irregular, inconsistent movement or behaviour; narrower than unpredictable, usually for patterns that jump around

  • volatile

    suggests strong, dangerous, or explosive changes, often in markets, situations, or emotions; more intense than unpredictable

  • fickle

    used mainly for people or weather that change loyalties or conditions frequently; carries a tone of annoyance or disappointment

  • capricious

    suggests sudden changes driven by whim or mood rather than by reason; formal register

反義詞
  • predictable

    direct opposite — easy to know or guess in advance

  • reliable

    can be trusted to behave or perform in the same way each time

  • steady

    not changing or fluctuating; constant in behaviour, level, or speed

文法句型

unpredictable + noun

be/seem/become + unpredictable

intensifier + unpredictable (highly/totally unpredictable)

用法筆記

Attributive use (an unpredictable outcome) and predicative use (the outcome is unpredictable) are both common. Frequently modified by intensifiers such as highly, totally, completely.

常見錯誤

❌The dice roll was unpredictable because I did not know the number.
✅The dice roll was random, not unpredictable
💡the chance of each number is known.' — 'unpredictable' implies no reliable pattern at all, while 'random' refers to a known probability with no single outcome guaranteed.
❌She is a very unpredictable driver — she always drives at the same speed.
✅She is a very predictable driver
💡she always drives at the same speed.' — 'unpredictable' means the opposite of 'always the same.'