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be unpredictable
[bi ʌnprɪˈdɪktəbl]
verb phrase
ser imprevisível
1.
to behave or occur in a way that cannot be easily foreseen or anticipated
The weather in spring can be unpredictable.
O tempo na primavera pode ser imprevisível.
2.
to act in an erratic or inconsistent manner that makes it difficult to anticipate one's actions
His mood swings make him unpredictable.
Suas oscilações de humor o tornam imprevisível.
NYC Slang
be all over the place
Synonyms
be erratic
be inconsistent
be capricious
be volatile
be uncertain
fluctuate
Antonyms
be predictable
be reliable
be consistent
be stable
be dependable
Regional Variations
General Brazilian
ser imprevisível
most common usage across Brazil
Rio de Janeiro
ser imprevisível
standard usage, sometimes 'ser inconstante'
São Paulo
ser imprevisível
preferred in formal and business contexts
Portugal
ser imprevisível
standard European Portuguese usage
Related Idioms & Phrases
a loose cannon
blow hot and cold
keep someone guessing
all bets are off
up in the air
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