useless at (something)

Translations
бесполезный в (чем-то)
He is useless at cooking.
Он бесполезен в приготовлении еды.
Definitions
Incapable of performing or achieving a particular task or activity effectively; lacking the necessary skills or abilities to be productive in a specific area.
Words
useless

adjective
бесполезный
at

preposition
в
something

pronoun
что то