unable to
Fueron incapaces de descubrir el menor secreto.
They were unable to discover the slightest secret.
Los científicos fueron incapaces de resolver el misterio.
Scientists were unable to solve the mystery.
— Akira (1988)
Ya eran incapaces de controlarse.
They were already incapable of controlling themselves.
Tanto Tom como Mary parecen incapaces de hacer eso.
Both Tom and Mary seem incapable of doing that.
Fueron incapaces de revelar algún secreto.
They were unable to reveal any secrets.
Los niños pequeños son incapaces de pensar de manera abstracta.
Young children are incapable of abstract thinking.