unpredictable effect

[/ˌʌnprɪˈdɪktəbəl ɪˈfɛkt/]
noun phrasepl: unpredictable effects
efeito imprevisível
1. A consequence or result that cannot be anticipated or foreseen; an outcome that is difficult or impossible to predict in advance
The new medication had unpredictable effects on different patients.
O novo medicamento teve efeitos imprevisíveis em diferentes pacientes.
2. In scientific or technical contexts, a result of an action or process that varies unexpectedly and cannot be reliably anticipated
The chemical reaction produced unpredictable effects when mixed with other compounds.
A reação química produziu efeitos imprevisíveis quando misturada com outros compostos.
This phrase is frequently used in Brazilian medical, pharmaceutical, and scientific literature when discussing medication side effects, experimental results, or technological outcomes. In both US and Brazilian contexts, it reflects a modern understanding of complex systems that don't always behave as theory predicts. The term is especially relevant in discussions about risk management and safety protocols in industries ranging from healthcare to technology.
NYC Slang
a wild card effect / something that throws you for a loop
Synonyms / Sinônimos
unexpected consequenceunforeseen resultuncertain outcomeunpredictable outcomevariable effect
Antonyms / Antônimos
predictable effectforeseeable consequenceexpected resultcertain outcome

Regional Variations

General Brazilian Portuguese
efeito imprevisível
Standard term used in most contexts
Rio de Janeiro
efeito imprevisível / efeito inesperado
Both terms are commonly used interchangeably
São Paulo
efeito imprevisível
Formal usage, particularly in medical and scientific contexts
Portugal
efeito imprevisível / efeito imprevisto
Both terms used; 'imprevisto' is slightly more common in European Portuguese

Related Words

unpredictabilityrandomnessvariabilityconsequenceside effectadverse effectcollateral damage

Related Idioms & Phrases

throw a curveball
expect the unexpected
a bolt from the blue
out of left field
a plot twist
Look up more words on Fala2Me
The free English-Portuguese dictionary with real Brazilian accents, NYC slang, conjugator and more
Open Fala2Me →