unpredictable
unpredictable — adjective
1. changing so often or so suddenly that you can never guess what will come next
changing so often or so suddenly that you can never guess what will come next
The mountain weather near Daichi's village is so unpredictable that storms arrive without warning.
so + adj + that clause for result
Tunde's boss is highly unpredictable, and staff never know what tasks will appear on their desks.
highly + adj for degree
The outcome of the election remained unpredictable until the very last votes were counted.
Anjali found life in the city unpredictable because new rules changed every few months.
Mia's old car became completely unpredictable, starting some mornings but staying silent on others.
- 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
- 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.