tricky

difficult to deal with or solve; requiring skill and care

difícil, complicado, problemático

• a tricky situation/problem/question

Collocations tricky question · tricky decision

• This is a tricky problem to solve.

  Este es un problema difícil de resolver.

unpredictable or unreliable; not behaving in the way you expect

impredecible, caprichoso, cambiante

• a tricky customer/client

Collocations tricky weather · tricky client

• The weather was very tricky, changing from sunny to rainy.

  El clima era muy impredecible, cambiando de soleado a lluvioso.