unknown quantity

• Pessoa ou coisa cujas características, capacidades ou potencial ainda são desconhecidos ou não foram compreendidos, geralmente implicando incerteza ou imprevisibilidade.

A person or thing whose characteristics, abilities, or potential are not yet known or understood, often implying uncertainty or unpredictability.

1. Unpredictable person or thingB2formal

   A person or thing whose characteristics, abilities, or behavior are not yet known or understood.

   Incerteza

   • The new manager is still an unknown quantity to the team.
   • In this experiment, the chemical reaction is an unknown quantity.
   • His performance in the final match remains an unknown quantity.